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Summary: Constants | Methods | Inherited Methods

# DatabaseMetaData

`public interface DatabaseMetaData`
`implements Wrapper`

java.sql.DatabaseMetaData

Comprehensive information about the database as a whole.

This interface is implemented by driver vendors to let users know the capabilities of a Database Management System (DBMS) in combination with the driver based on JDBCTM technology ("JDBC driver") that is used with it. Different relational DBMSs often support different features, implement features in different ways, and use different data types. In addition, a driver may implement a feature on top of what the DBMS offers. Information returned by methods in this interface applies to the capabilities of a particular driver and a particular DBMS working together. Note that as used in this documentation, the term "database" is used generically to refer to both the driver and DBMS.

A user for this interface is commonly a tool that needs to discover how to deal with the underlying DBMS. This is especially true for applications that are intended to be used with more than one DBMS. For example, a tool might use the method `getTypeInfo` to find out what data types can be used in a `CREATE TABLE` statement. Or a user might call the method `supportsCorrelatedSubqueries` to see if it is possible to use a correlated subquery or `supportsBatchUpdates` to see if it is possible to use batch updates.

Some `DatabaseMetaData` methods return lists of information in the form of `ResultSet` objects. Regular `ResultSet` methods, such as `getString` and `getInt`, can be used to retrieve the data from these `ResultSet` objects. If a given form of metadata is not available, an empty `ResultSet` will be returned. Additional columns beyond the columns defined to be returned by the `ResultSet` object for a given method can be defined by the JDBC driver vendor and must be accessed by their column label.

Some `DatabaseMetaData` methods take arguments that are String patterns. These arguments all have names such as fooPattern. Within a pattern String, "%" means match any substring of 0 or more characters, and "_" means match any one character. Only metadata entries matching the search pattern are returned. If a search pattern argument is set to `null`, that argument's criterion will be dropped from the search.

## Summary

### Constants
`short` | `attributeNoNulls` Indicates that `NULL` values might not be allowed.
`short` | `attributeNullable` Indicates that `NULL` values are definitely allowed.
`short` | `attributeNullableUnknown` Indicates that whether `NULL` values are allowed is not known.
`int` | `bestRowNotPseudo` Indicates that the best row identifier is NOT a pseudo column.
`int` | `bestRowPseudo` Indicates that the best row identifier is a pseudo column.
`int` | `bestRowSession` Indicates that the scope of the best row identifier is the remainder of the current session.
`int` | `bestRowTemporary` Indicates that the scope of the best row identifier is very temporary, lasting only while the row is being used.
`int` | `bestRowTransaction` Indicates that the scope of the best row identifier is the remainder of the current transaction.
`int` | `bestRowUnknown` Indicates that the best row identifier may or may not be a pseudo column.
`int` | `columnNoNulls` Indicates that the column might not allow `NULL` values.
`int` | `columnNullable` Indicates that the column definitely allows `NULL` values.
`int` | `columnNullableUnknown` Indicates that the nullability of columns is unknown.
`int` | `functionColumnIn` Indicates that the parameter or column is an IN parameter.
`int` | `functionColumnInOut` Indicates that the parameter or column is an INOUT parameter.
`int` | `functionColumnOut` Indicates that the parameter or column is an OUT parameter.
`int` | `functionColumnResult` Indicates that the parameter or column is a column in a result set.
`int` | `functionColumnUnknown` Indicates that type of the parameter or column is unknown.
`int` | `functionNoNulls` Indicates that `NULL` values are not allowed.
`int` | `functionNoTable` Indicates that the function does not return a table.
`int` | `functionNullable` Indicates that `NULL` values are allowed.
`int` | `functionNullableUnknown` Indicates that whether `NULL` values are allowed is unknown.
`int` | `functionResultUnknown` Indicates that it is not known whether the function returns a result or a table.
`int` | `functionReturn` Indicates that the parameter or column is a return value.
`int` | `functionReturnsTable` Indicates that the function returns a table.
`int` | `importedKeyCascade` For the column `UPDATE_RULE`, indicates that when the primary key is updated, the foreign key (imported key) is changed to agree with it.
`int` | `importedKeyInitiallyDeferred` Indicates deferrability.
`int` | `importedKeyInitiallyImmediate` Indicates deferrability.
`int` | `importedKeyNoAction` For the columns `UPDATE_RULE` and `DELETE_RULE`, indicates that if the primary key has been imported, it cannot be updated or deleted.
`int` | `importedKeyNotDeferrable` Indicates deferrability.
`int` | `importedKeyRestrict` For the column `UPDATE_RULE`, indicates that a primary key may not be updated if it has been imported by another table as a foreign key.
`int` | `importedKeySetDefault` For the columns `UPDATE_RULE` and `DELETE_RULE`, indicates that if the primary key is updated or deleted, the foreign key (imported key) is set to the default value.
`int` | `importedKeySetNull` For the columns `UPDATE_RULE` and `DELETE_RULE`, indicates that when the primary key is updated or deleted, the foreign key (imported key) is changed to `NULL`.
`int` | `procedureColumnIn` Indicates that the column stores IN parameters.
`int` | `procedureColumnInOut` Indicates that the column stores INOUT parameters.
`int` | `procedureColumnOut` Indicates that the column stores OUT parameters.
`int` | `procedureColumnResult` Indicates that the column stores results.
`int` | `procedureColumnReturn` Indicates that the column stores return values.
`int` | `procedureColumnUnknown` Indicates that type of the column is unknown.
`int` | `procedureNoNulls` Indicates that `NULL` values are not allowed.
`int` | `procedureNoResult` Indicates that the procedure does not return a result.
`int` | `procedureNullable` Indicates that `NULL` values are allowed.
`int` | `procedureNullableUnknown` Indicates that whether `NULL` values are allowed is unknown.
`int` | `procedureResultUnknown` Indicates that it is not known whether the procedure returns a result.
`int` | `procedureReturnsResult` Indicates that the procedure returns a result.
`int` | `sqlStateSQL` A possible return value for the method `DatabaseMetaData.getSQLStateType` which is used to indicate whether the value returned by the method `SQLException.getSQLState` is an SQLSTATE value.
`int` | `sqlStateSQL99` A possible return value for the method `DatabaseMetaData.getSQLStateType` which is used to indicate whether the value returned by the method `SQLException.getSQLState` is an SQL99 SQLSTATE value.
`int` | `sqlStateXOpen` A possible return value for the method `DatabaseMetaData.getSQLStateType` which is used to indicate whether the value returned by the method `SQLException.getSQLState` is an X/Open (now know as Open Group) SQL CLI SQLSTATE value.
`short` | `tableIndexClustered` Indicates that this table index is a clustered index.
`short` | `tableIndexHashed` Indicates that this table index is a hashed index.
`short` | `tableIndexOther` Indicates that this table index is not a clustered index, a hashed index, or table statistics; it is something other than these.
`short` | `tableIndexStatistic` Indicates that this column contains table statistics that are returned in conjunction with a table's index descriptions.
`int` | `typeNoNulls` Indicates that a `NULL` value is NOT allowed for this data type.
`int` | `typeNullable` Indicates that a `NULL` value is allowed for this data type.
`int` | `typeNullableUnknown` Indicates that it is not known whether a `NULL` value is allowed for this data type.
`int` | `typePredBasic` Indicates that the data type can be only be used in `WHERE` search clauses that do not use `LIKE` predicates.
`int` | `typePredChar` Indicates that the data type can be only be used in `WHERE` search clauses that use `LIKE` predicates.
`int` | `typePredNone` Indicates that `WHERE` search clauses are not supported for this type.
`int` | `typeSearchable` Indicates that all `WHERE` search clauses can be based on this type.
`int` | `versionColumnNotPseudo` Indicates that this version column is NOT a pseudo column.
`int` | `versionColumnPseudo` Indicates that this version column is a pseudo column.
`int` | `versionColumnUnknown` Indicates that this version column may or may not be a pseudo column.

### Public methods
`abstract boolean` | `allProceduresAreCallable()` Retrieves whether the current user can call all the procedures returned by the method `getProcedures`.
`abstract boolean` | `allTablesAreSelectable()` Retrieves whether the current user can use all the tables returned by the method `getTables` in a `SELECT` statement.
`abstract boolean` | `autoCommitFailureClosesAllResultSets()` Retrieves whether a `SQLException` while autoCommit is `true` inidcates that all open ResultSets are closed, even ones that are holdable.
`abstract boolean` | `dataDefinitionCausesTransactionCommit()` Retrieves whether a data definition statement within a transaction forces the transaction to commit.
`abstract boolean` | `dataDefinitionIgnoredInTransactions()` Retrieves whether this database ignores a data definition statement within a transaction.
`abstract boolean` | `deletesAreDetected(int type)` Retrieves whether or not a visible row delete can be detected by calling the method `ResultSet.rowDeleted`.
`abstract boolean` | `doesMaxRowSizeIncludeBlobs()` Retrieves whether the return value for the method `getMaxRowSize` includes the SQL data types `LONGVARCHAR` and `LONGVARBINARY`.
`abstract ResultSet` | `getAttributes(String catalog, String schemaPattern, String typeNamePattern, String attributeNamePattern)` Retrieves a description of the given attribute of the given type for a user-defined type (UDT) that is available in the given schema and catalog.
`abstract ResultSet` | `getBestRowIdentifier(String catalog, String schema, String table, int scope, boolean nullable)` Retrieves a description of a table's optimal set of columns that uniquely identifies a row.
`abstract String` | `getCatalogSeparator()` Retrieves the `String` that this database uses as the separator between a catalog and table name.
`abstract String` | `getCatalogTerm()` Retrieves the database vendor's preferred term for "catalog".
`abstract ResultSet` | `getCatalogs()` Retrieves the catalog names available in this database.
`abstract ResultSet` | `getClientInfoProperties()` Retrieves a list of the client info properties that the driver supports.
`abstract ResultSet` | `getColumnPrivileges(String catalog, String schema, String table, String columnNamePattern)` Retrieves a description of the access rights for a table's columns.
`abstract ResultSet` | `getColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern)` Retrieves a description of table columns available in the specified catalog.
`abstract Connection` | `getConnection()` Retrieves the connection that produced this metadata object.
`abstract ResultSet` | `getCrossReference(String parentCatalog, String parentSchema, String parentTable, String foreignCatalog, String foreignSchema, String foreignTable)` Retrieves a description of the foreign key columns in the given foreign key table that reference the primary key or the columns representing a unique constraint of the parent table (could be the same or a different table).
`abstract int` | `getDatabaseMajorVersion()` Retrieves the major version number of the underlying database.
`abstract int` | `getDatabaseMinorVersion()` Retrieves the minor version number of the underlying database.
`abstract String` | `getDatabaseProductName()` Retrieves the name of this database product.
`abstract String` | `getDatabaseProductVersion()` Retrieves the version number of this database product.
`abstract int` | `getDefaultTransactionIsolation()` Retrieves this database's default transaction isolation level.
`abstract int` | `getDriverMajorVersion()` Retrieves this JDBC driver's major version number.
`abstract int` | `getDriverMinorVersion()` Retrieves this JDBC driver's minor version number.
`abstract String` | `getDriverName()` Retrieves the name of this JDBC driver.
`abstract String` | `getDriverVersion()` Retrieves the version number of this JDBC driver as a `String`.
`abstract ResultSet` | `getExportedKeys(String catalog, String schema, String table)` Retrieves a description of the foreign key columns that reference the given table's primary key columns (the foreign keys exported by a table).
`abstract String` | `getExtraNameCharacters()` Retrieves all the "extra" characters that can be used in unquoted identifier names (those beyond a-z, A-Z, 0-9 and _).
`abstract ResultSet` | `getFunctionColumns(String catalog, String schemaPattern, String functionNamePattern, String columnNamePattern)` Retrieves a description of the given catalog's system or user function parameters and return type.
`abstract ResultSet` | `getFunctions(String catalog, String schemaPattern, String functionNamePattern)` Retrieves a description of the system and user functions available in the given catalog.
`abstract String` | `getIdentifierQuoteString()` Retrieves the string used to quote SQL identifiers.
`abstract ResultSet` | `getImportedKeys(String catalog, String schema, String table)` Retrieves a description of the primary key columns that are referenced by the given table's foreign key columns (the primary keys imported by a table).
`abstract ResultSet` | `getIndexInfo(String catalog, String schema, String table, boolean unique, boolean approximate)` Retrieves a description of the given table's indices and statistics.
`abstract int` | `getJDBCMajorVersion()` Retrieves the major JDBC version number for this driver.
`abstract int` | `getJDBCMinorVersion()` Retrieves the minor JDBC version number for this driver.
`abstract int` | `getMaxBinaryLiteralLength()` Retrieves the maximum number of hex characters this database allows in an inline binary literal.
`abstract int` | `getMaxCatalogNameLength()` Retrieves the maximum number of characters that this database allows in a catalog name.
`abstract int` | `getMaxCharLiteralLength()` Retrieves the maximum number of characters this database allows for a character literal.
`abstract int` | `getMaxColumnNameLength()` Retrieves the maximum number of characters this database allows for a column name.
`abstract int` | `getMaxColumnsInGroupBy()` Retrieves the maximum number of columns this database allows in a `GROUP BY` clause.
`abstract int` | `getMaxColumnsInIndex()` Retrieves the maximum number of columns this database allows in an index.
`abstract int` | `getMaxColumnsInOrderBy()` Retrieves the maximum number of columns this database allows in an `ORDER BY` clause.
`abstract int` | `getMaxColumnsInSelect()` Retrieves the maximum number of columns this database allows in a `SELECT` list.
`abstract int` | `getMaxColumnsInTable()` Retrieves the maximum number of columns this database allows in a table.
`abstract int` | `getMaxConnections()` Retrieves the maximum number of concurrent connections to this database that are possible.
`abstract int` | `getMaxCursorNameLength()` Retrieves the maximum number of characters that this database allows in a cursor name.
`abstract int` | `getMaxIndexLength()` Retrieves the maximum number of bytes this database allows for an index, including all of the parts of the index.
`abstract int` | `getMaxProcedureNameLength()` Retrieves the maximum number of characters that this database allows in a procedure name.
`abstract int` | `getMaxRowSize()` Retrieves the maximum number of bytes this database allows in a single row.
`abstract int` | `getMaxSchemaNameLength()` Retrieves the maximum number of characters that this database allows in a schema name.
`abstract int` | `getMaxStatementLength()` Retrieves the maximum number of characters this database allows in an SQL statement.
`abstract int` | `getMaxStatements()` Retrieves the maximum number of active statements to this database that can be open at the same time.
`abstract int` | `getMaxTableNameLength()` Retrieves the maximum number of characters this database allows in a table name.
`abstract int` | `getMaxTablesInSelect()` Retrieves the maximum number of tables this database allows in a `SELECT` statement.
`abstract int` | `getMaxUserNameLength()` Retrieves the maximum number of characters this database allows in a user name.
`abstract String` | `getNumericFunctions()` Retrieves a comma-separated list of math functions available with this database.
`abstract ResultSet` | `getPrimaryKeys(String catalog, String schema, String table)` Retrieves a description of the given table's primary key columns.
`abstract ResultSet` | `getProcedureColumns(String catalog, String schemaPattern, String procedureNamePattern, String columnNamePattern)` Retrieves a description of the given catalog's stored procedure parameter and result columns.
`abstract String` | `getProcedureTerm()` Retrieves the database vendor's preferred term for "procedure".
`abstract ResultSet` | `getProcedures(String catalog, String schemaPattern, String procedureNamePattern)` Retrieves a description of the stored procedures available in the given catalog.
`abstract int` | `getResultSetHoldability()` Retrieves this database's default holdability for `ResultSet` objects.
`abstract RowIdLifetime` | `getRowIdLifetime()` Indicates whether or not this data source supports the SQL `ROWID` type, and if so the lifetime for which a `RowId` object remains valid.
`abstract String` | `getSQLKeywords()` Retrieves a comma-separated list of all of this database's SQL keywords that are NOT also SQL:2003 keywords.
`abstract int` | `getSQLStateType()` Indicates whether the SQLSTATE returned by `SQLException.getSQLState` is X/Open (now known as Open Group) SQL CLI or SQL:2003.
`abstract String` | `getSchemaTerm()` Retrieves the database vendor's preferred term for "schema".
`abstract ResultSet` | `getSchemas(String catalog, String schemaPattern)` Retrieves the schema names available in this database.
`abstract ResultSet` | `getSchemas()` Retrieves the schema names available in this database.
`abstract String` | `getSearchStringEscape()` Retrieves the string that can be used to escape wildcard characters.
`abstract String` | `getStringFunctions()` Retrieves a comma-separated list of string functions available with this database.
`abstract ResultSet` | `getSuperTables(String catalog, String schemaPattern, String tableNamePattern)` Retrieves a description of the table hierarchies defined in a particular schema in this database.
`abstract ResultSet` | `getSuperTypes(String catalog, String schemaPattern, String typeNamePattern)` Retrieves a description of the user-defined type (UDT) hierarchies defined in a particular schema in this database.
`abstract String` | `getSystemFunctions()` Retrieves a comma-separated list of system functions available with this database.
`abstract ResultSet` | `getTablePrivileges(String catalog, String schemaPattern, String tableNamePattern)` Retrieves a description of the access rights for each table available in a catalog.
`abstract ResultSet` | `getTableTypes()` Retrieves the table types available in this database.
`abstract ResultSet` | `getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types)` Retrieves a description of the tables available in the given catalog.
`abstract String` | `getTimeDateFunctions()` Retrieves a comma-separated list of the time and date functions available with this database.
`abstract ResultSet` | `getTypeInfo()` Retrieves a description of all the data types supported by this database.
`abstract ResultSet` | `getUDTs(String catalog, String schemaPattern, String typeNamePattern, int[] types)` Retrieves a description of the user-defined types (UDTs) defined in a particular schema.
`abstract String` | `getURL()` Retrieves the URL for this DBMS.
`abstract String` | `getUserName()` Retrieves the user name as known to this database.
`abstract ResultSet` | `getVersionColumns(String catalog, String schema, String table)` Retrieves a description of a table's columns that are automatically updated when any value in a row is updated.
`abstract boolean` | `insertsAreDetected(int type)` Retrieves whether or not a visible row insert can be detected by calling the method `ResultSet.rowInserted`.
`abstract boolean` | `isCatalogAtStart()` Retrieves whether a catalog appears at the start of a fully qualified table name.
`abstract boolean` | `isReadOnly()` Retrieves whether this database is in read-only mode.
`abstract boolean` | `locatorsUpdateCopy()` Indicates whether updates made to a LOB are made on a copy or directly to the LOB.
`abstract boolean` | `nullPlusNonNullIsNull()` Retrieves whether this database supports concatenations between `NULL` and non-`NULL` values being `NULL`.
`abstract boolean` | `nullsAreSortedAtEnd()` Retrieves whether `NULL` values are sorted at the end regardless of sort order.
`abstract boolean` | `nullsAreSortedAtStart()` Retrieves whether `NULL` values are sorted at the start regardless of sort order.
`abstract boolean` | `nullsAreSortedHigh()` Retrieves whether `NULL` values are sorted high.
`abstract boolean` | `nullsAreSortedLow()` Retrieves whether `NULL` values are sorted low.
`abstract boolean` | `othersDeletesAreVisible(int type)` Retrieves whether deletes made by others are visible.
`abstract boolean` | `othersInsertsAreVisible(int type)` Retrieves whether inserts made by others are visible.
`abstract boolean` | `othersUpdatesAreVisible(int type)` Retrieves whether updates made by others are visible.
`abstract boolean` | `ownDeletesAreVisible(int type)` Retrieves whether a result set's own deletes are visible.
`abstract boolean` | `ownInsertsAreVisible(int type)` Retrieves whether a result set's own inserts are visible.
`abstract boolean` | `ownUpdatesAreVisible(int type)` Retrieves whether for the given type of `ResultSet` object, the result set's own updates are visible.
`abstract boolean` | `storesLowerCaseIdentifiers()` Retrieves whether this database treats mixed case unquoted SQL identifiers as case insensitive and stores them in lower case.
`abstract boolean` | `storesLowerCaseQuotedIdentifiers()` Retrieves whether this database treats mixed case quoted SQL identifiers as case insensitive and stores them in lower case.
`abstract boolean` | `storesMixedCaseIdentifiers()` Retrieves whether this database treats mixed case unquoted SQL identifiers as case insensitive and stores them in mixed case.
`abstract boolean` | `storesMixedCaseQuotedIdentifiers()` Retrieves whether this database treats mixed case quoted SQL identifiers as case insensitive and stores them in mixed case.
`abstract boolean` | `storesUpperCaseIdentifiers()` Retrieves whether this database treats mixed case unquoted SQL identifiers as case insensitive and stores them in upper case.
`abstract boolean` | `storesUpperCaseQuotedIdentifiers()` Retrieves whether this database treats mixed case quoted SQL identifiers as case insensitive and stores them in upper case.
`abstract boolean` | `supportsANSI92EntryLevelSQL()` Retrieves whether this database supports the ANSI92 entry level SQL grammar.
`abstract boolean` | `supportsANSI92FullSQL()` Retrieves whether this database supports the ANSI92 full SQL grammar supported.
`abstract boolean` | `supportsANSI92IntermediateSQL()` Retrieves whether this database supports the ANSI92 intermediate SQL grammar supported.
`abstract boolean` | `supportsAlterTableWithAddColumn()` Retrieves whether this database supports `ALTER TABLE` with add column.
`abstract boolean` | `supportsAlterTableWithDropColumn()` Retrieves whether this database supports `ALTER TABLE` with drop column.
`abstract boolean` | `supportsBatchUpdates()` Retrieves whether this database supports batch updates.
`abstract boolean` | `supportsCatalogsInDataManipulation()` Retrieves whether a catalog name can be used in a data manipulation statement.
`abstract boolean` | `supportsCatalogsInIndexDefinitions()` Retrieves whether a catalog name can be used in an index definition statement.
`abstract boolean` | `supportsCatalogsInPrivilegeDefinitions()` Retrieves whether a catalog name can be used in a privilege definition statement.
`abstract boolean` | `supportsCatalogsInProcedureCalls()` Retrieves whether a catalog name can be used in a procedure call statement.
`abstract boolean` | `supportsCatalogsInTableDefinitions()` Retrieves whether a catalog name can be used in a table definition statement.
`abstract boolean` | `supportsColumnAliasing()` Retrieves whether this database supports column aliasing.
`abstract boolean` | `supportsConvert(int fromType, int toType)` Retrieves whether this database supports the JDBC scalar function `CONVERT` for conversions between the JDBC types fromType and toType.
`abstract boolean` | `supportsConvert()` Retrieves whether this database supports the JDBC scalar function `CONVERT` for the conversion of one JDBC type to another.
`abstract boolean` | `supportsCoreSQLGrammar()` Retrieves whether this database supports the ODBC Core SQL grammar.
`abstract boolean` | `supportsCorrelatedSubqueries()` Retrieves whether this database supports correlated subqueries.
`abstract boolean` | `supportsDataDefinitionAndDataManipulationTransactions()` Retrieves whether this database supports both data definition and data manipulation statements within a transaction.
`abstract boolean` | `supportsDataManipulationTransactionsOnly()` Retrieves whether this database supports only data manipulation statements within a transaction.
`abstract boolean` | `supportsDifferentTableCorrelationNames()` Retrieves whether, when table correlation names are supported, they are restricted to being different from the names of the tables.
`abstract boolean` | `supportsExpressionsInOrderBy()` Retrieves whether this database supports expressions in `ORDER BY` lists.
`abstract boolean` | `supportsExtendedSQLGrammar()` Retrieves whether this database supports the ODBC Extended SQL grammar.
`abstract boolean` | `supportsFullOuterJoins()` Retrieves whether this database supports full nested outer joins.
`abstract boolean` | `supportsGetGeneratedKeys()` Retrieves whether auto-generated keys can be retrieved after a statement has been executed
`abstract boolean` | `supportsGroupBy()` Retrieves whether this database supports some form of `GROUP BY` clause.
`abstract boolean` | `supportsGroupByBeyondSelect()` Retrieves whether this database supports using columns not included in the `SELECT` statement in a `GROUP BY` clause provided that all of the columns in the `SELECT` statement are included in the `GROUP BY` clause.
`abstract boolean` | `supportsGroupByUnrelated()` Retrieves whether this database supports using a column that is not in the `SELECT` statement in a `GROUP BY` clause.
`abstract boolean` | `supportsIntegrityEnhancementFacility()` Retrieves whether this database supports the SQL Integrity Enhancement Facility.
`abstract boolean` | `supportsLikeEscapeClause()` Retrieves whether this database supports specifying a `LIKE` escape clause.
`abstract boolean` | `supportsLimitedOuterJoins()` Retrieves whether this database provides limited support for outer joins.
`abstract boolean` | `supportsMinimumSQLGrammar()` Retrieves whether this database supports the ODBC Minimum SQL grammar.
`abstract boolean` | `supportsMixedCaseIdentifiers()` Retrieves whether this database treats mixed case unquoted SQL identifiers as case sensitive and as a result stores them in mixed case.
`abstract boolean` | `supportsMixedCaseQuotedIdentifiers()` Retrieves whether this database treats mixed case quoted SQL identifiers as case sensitive and as a result stores them in mixed case.
`abstract boolean` | `supportsMultipleOpenResults()` Retrieves whether it is possible to have multiple `ResultSet` objects returned from a `CallableStatement` object simultaneously.
`abstract boolean` | `supportsMultipleResultSets()` Retrieves whether this database supports getting multiple `ResultSet` objects from a single call to the method `execute`.
`abstract boolean` | `supportsMultipleTransactions()` Retrieves whether this database allows having multiple transactions open at once (on different connections).
`abstract boolean` | `supportsNamedParameters()` Retrieves whether this database supports named parameters to callable statements.
`abstract boolean` | `supportsNonNullableColumns()` Retrieves whether columns in this database may be defined as non-nullable.
`abstract boolean` | `supportsOpenCursorsAcrossCommit()` Retrieves whether this database supports keeping cursors open across commits.
`abstract boolean` | `supportsOpenCursorsAcrossRollback()` Retrieves whether this database supports keeping cursors open across rollbacks.
`abstract boolean` | `supportsOpenStatementsAcrossCommit()` Retrieves whether this database supports keeping statements open across commits.
`abstract boolean` | `supportsOpenStatementsAcrossRollback()` Retrieves whether this database supports keeping statements open across rollbacks.
`abstract boolean` | `supportsOrderByUnrelated()` Retrieves whether this database supports using a column that is not in the `SELECT` statement in an `ORDER BY` clause.
`abstract boolean` | `supportsOuterJoins()` Retrieves whether this database supports some form of outer join.
`abstract boolean` | `supportsPositionedDelete()` Retrieves whether this database supports positioned `DELETE` statements.
`abstract boolean` | `supportsPositionedUpdate()` Retrieves whether this database supports positioned `UPDATE` statements.
`abstract boolean` | `supportsResultSetConcurrency(int type, int concurrency)` Retrieves whether this database supports the given concurrency type in combination with the given result set type.
`abstract boolean` | `supportsResultSetHoldability(int holdability)` Retrieves whether this database supports the given result set holdability.
`abstract boolean` | `supportsResultSetType(int type)` Retrieves whether this database supports the given result set type.
`abstract boolean` | `supportsSavepoints()` Retrieves whether this database supports savepoints.
`abstract boolean` | `supportsSchemasInDataManipulation()` Retrieves whether a schema name can be used in a data manipulation statement.
`abstract boolean` | `supportsSchemasInIndexDefinitions()` Retrieves whether a schema name can be used in an index definition statement.
`abstract boolean` | `supportsSchemasInPrivilegeDefinitions()` Retrieves whether a schema name can be used in a privilege definition statement.
`abstract boolean` | `supportsSchemasInProcedureCalls()` Retrieves whether a schema name can be used in a procedure call statement.
`abstract boolean` | `supportsSchemasInTableDefinitions()` Retrieves whether a schema name can be used in a table definition statement.
`abstract boolean` | `supportsSelectForUpdate()` Retrieves whether this database supports `SELECT FOR UPDATE` statements.
`abstract boolean` | `supportsStatementPooling()` Retrieves whether this database supports statement pooling.
`abstract boolean` | `supportsStoredFunctionsUsingCallSyntax()` Retrieves whether this database supports invoking user-defined or vendor functions using the stored procedure escape syntax.
`abstract boolean` | `supportsStoredProcedures()` Retrieves whether this database supports stored procedure calls that use the stored procedure escape syntax.
`abstract boolean` | `supportsSubqueriesInComparisons()` Retrieves whether this database supports subqueries in comparison expressions.
`abstract boolean` | `supportsSubqueriesInExists()` Retrieves whether this database supports subqueries in `EXISTS` expressions.
`abstract boolean` | `supportsSubqueriesInIns()` Retrieves whether this database supports subqueries in `IN` expressions.
`abstract boolean` | `supportsSubqueriesInQuantifieds()` Retrieves whether this database supports subqueries in quantified expressions.
`abstract boolean` | `supportsTableCorrelationNames()` Retrieves whether this database supports table correlation names.
`abstract boolean` | `supportsTransactionIsolationLevel(int level)` Retrieves whether this database supports the given transaction isolation level.
`abstract boolean` | `supportsTransactions()` Retrieves whether this database supports transactions.
`abstract boolean` | `supportsUnion()` Retrieves whether this database supports SQL `UNION`.
`abstract boolean` | `supportsUnionAll()` Retrieves whether this database supports SQL `UNION ALL`.
`abstract boolean` | `updatesAreDetected(int type)` Retrieves whether or not a visible row update can be detected by calling the method `ResultSet.rowUpdated`.
`abstract boolean` | `usesLocalFilePerTable()` Retrieves whether this database uses a file for each table.
`abstract boolean` | `usesLocalFiles()` Retrieves whether this database stores tables in a local file.

### Inherited methods
From interface `java.sql.Wrapper`
`abstract boolean` | `isWrapperFor(Class<?> iface)` Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does.
`abstract <T> T` | `unwrap(Class<T> iface)` Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy.

## Constants

### attributeNoNulls

    public static final short attributeNoNulls

Indicates that `NULL` values might not be allowed.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getAttributes`.

Constant Value: 0 (0x00000000)

### attributeNullable

    public static final short attributeNullable

Indicates that `NULL` values are definitely allowed.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getAttributes`.

Constant Value: 1 (0x00000001)

### attributeNullableUnknown

    public static final short attributeNullableUnknown

Indicates that whether `NULL` values are allowed is not known.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getAttributes`.

Constant Value: 2 (0x00000002)

### bestRowNotPseudo

    public static final int bestRowNotPseudo

Indicates that the best row identifier is NOT a pseudo column.

A possible value for the column `PSEUDO_COLUMN` in the `ResultSet` object returned by the method `getBestRowIdentifier`.

Constant Value: 1 (0x00000001)

### bestRowPseudo

    public static final int bestRowPseudo

Indicates that the best row identifier is a pseudo column.

A possible value for the column `PSEUDO_COLUMN` in the `ResultSet` object returned by the method `getBestRowIdentifier`.

Constant Value: 2 (0x00000002)

### bestRowSession

    public static final int bestRowSession

Indicates that the scope of the best row identifier is the remainder of the current session.

A possible value for the column `SCOPE` in the `ResultSet` object returned by the method `getBestRowIdentifier`.

Constant Value: 2 (0x00000002)

### bestRowTemporary

    public static final int bestRowTemporary

Indicates that the scope of the best row identifier is very temporary, lasting only while the row is being used.

A possible value for the column `SCOPE` in the `ResultSet` object returned by the method `getBestRowIdentifier`.

Constant Value: 0 (0x00000000)

### bestRowTransaction

    public static final int bestRowTransaction

Indicates that the scope of the best row identifier is the remainder of the current transaction.

A possible value for the column `SCOPE` in the `ResultSet` object returned by the method `getBestRowIdentifier`.

Constant Value: 1 (0x00000001)

### bestRowUnknown

    public static final int bestRowUnknown

Indicates that the best row identifier may or may not be a pseudo column.

A possible value for the column `PSEUDO_COLUMN` in the `ResultSet` object returned by the method `getBestRowIdentifier`.

Constant Value: 0 (0x00000000)

### columnNoNulls

    public static final int columnNoNulls

Indicates that the column might not allow `NULL` values.

A possible value for the column `NULLABLE` in the `ResultSet` returned by the method `getColumns`.

Constant Value: 0 (0x00000000)

### columnNullable

    public static final int columnNullable

Indicates that the column definitely allows `NULL` values.

A possible value for the column `NULLABLE` in the `ResultSet` returned by the method `getColumns`.

Constant Value: 1 (0x00000001)

### columnNullableUnknown

    public static final int columnNullableUnknown

Indicates that the nullability of columns is unknown.

A possible value for the column `NULLABLE` in the `ResultSet` returned by the method `getColumns`.

Constant Value: 2 (0x00000002)

### functionColumnIn

    public static final int functionColumnIn

Indicates that the parameter or column is an IN parameter.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getFunctionColumns`.

Constant Value: 1 (0x00000001)

### functionColumnInOut

    public static final int functionColumnInOut

Indicates that the parameter or column is an INOUT parameter.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getFunctionColumns`.

Constant Value: 2 (0x00000002)

### functionColumnOut

    public static final int functionColumnOut

Indicates that the parameter or column is an OUT parameter.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getFunctionColumns`.

Constant Value: 3 (0x00000003)

### functionColumnResult

    public static final int functionColumnResult

Indicates that the parameter or column is a column in a result set.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getFunctionColumns`.

Constant Value: 5 (0x00000005)

### functionColumnUnknown

    public static final int functionColumnUnknown

Indicates that type of the parameter or column is unknown.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getFunctionColumns`.

Constant Value: 0 (0x00000000)

### functionNoNulls

    public static final int functionNoNulls

Indicates that `NULL` values are not allowed.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getFunctionColumns`.

Constant Value: 0 (0x00000000)

### functionNoTable

    public static final int functionNoTable

Indicates that the function does not return a table.

A possible value for column `FUNCTION_TYPE` in the `ResultSet` object returned by the method `getFunctions`.

Constant Value: 1 (0x00000001)

### functionNullable

    public static final int functionNullable

Indicates that `NULL` values are allowed.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getFunctionColumns`.

Constant Value: 1 (0x00000001)

### functionNullableUnknown

    public static final int functionNullableUnknown

Indicates that whether `NULL` values are allowed is unknown.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getFunctionColumns`.

Constant Value: 2 (0x00000002)

### functionResultUnknown

    public static final int functionResultUnknown

Indicates that it is not known whether the function returns a result or a table.

A possible value for column `FUNCTION_TYPE` in the `ResultSet` object returned by the method `getFunctions`.

Constant Value: 0 (0x00000000)

### functionReturn

    public static final int functionReturn

Indicates that the parameter or column is a return value.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getFunctionColumns`.

Constant Value: 4 (0x00000004)

### functionReturnsTable

    public static final int functionReturnsTable

Indicates that the function returns a table.

A possible value for column `FUNCTION_TYPE` in the `ResultSet` object returned by the method `getFunctions`.

Constant Value: 2 (0x00000002)

### importedKeyCascade

    public static final int importedKeyCascade

For the column `UPDATE_RULE`, indicates that when the primary key is updated, the foreign key (imported key) is changed to agree with it. For the column `DELETE_RULE`, it indicates that when the primary key is deleted, rows that imported that key are deleted.

A possible value for the columns `UPDATE_RULE` and `DELETE_RULE` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 0 (0x00000000)

### importedKeyInitiallyDeferred

    public static final int importedKeyInitiallyDeferred

Indicates deferrability. See SQL-92 for a definition.

A possible value for the column `DEFERRABILITY` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 5 (0x00000005)

### importedKeyInitiallyImmediate

    public static final int importedKeyInitiallyImmediate

Indicates deferrability. See SQL-92 for a definition.

A possible value for the column `DEFERRABILITY` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 6 (0x00000006)

### importedKeyNoAction

    public static final int importedKeyNoAction

For the columns `UPDATE_RULE` and `DELETE_RULE`, indicates that if the primary key has been imported, it cannot be updated or deleted.

A possible value for the columns `UPDATE_RULE` and `DELETE_RULE` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 3 (0x00000003)

### importedKeyNotDeferrable

    public static final int importedKeyNotDeferrable

Indicates deferrability. See SQL-92 for a definition.

A possible value for the column `DEFERRABILITY` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 7 (0x00000007)

### importedKeyRestrict

    public static final int importedKeyRestrict

For the column `UPDATE_RULE`, indicates that a primary key may not be updated if it has been imported by another table as a foreign key. For the column `DELETE_RULE`, indicates that a primary key may not be deleted if it has been imported by another table as a foreign key.

A possible value for the columns `UPDATE_RULE` and `DELETE_RULE` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 1 (0x00000001)

### importedKeySetDefault

    public static final int importedKeySetDefault

For the columns `UPDATE_RULE` and `DELETE_RULE`, indicates that if the primary key is updated or deleted, the foreign key (imported key) is set to the default value.

A possible value for the columns `UPDATE_RULE` and `DELETE_RULE` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 4 (0x00000004)

### importedKeySetNull

    public static final int importedKeySetNull

For the columns `UPDATE_RULE` and `DELETE_RULE`, indicates that when the primary key is updated or deleted, the foreign key (imported key) is changed to `NULL`.

A possible value for the columns `UPDATE_RULE` and `DELETE_RULE` in the `ResultSet` objects returned by the methods `getImportedKeys`, `getExportedKeys`, and `getCrossReference`.

Constant Value: 2 (0x00000002)

### procedureColumnIn

    public static final int procedureColumnIn

Indicates that the column stores IN parameters.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getProcedureColumns`.

Constant Value: 1 (0x00000001)

### procedureColumnInOut

    public static final int procedureColumnInOut

Indicates that the column stores INOUT parameters.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getProcedureColumns`.

Constant Value: 2 (0x00000002)

### procedureColumnOut

    public static final int procedureColumnOut

Indicates that the column stores OUT parameters.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getProcedureColumns`.

Constant Value: 4 (0x00000004)

### procedureColumnResult

    public static final int procedureColumnResult

Indicates that the column stores results.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getProcedureColumns`.

Constant Value: 3 (0x00000003)

### procedureColumnReturn

    public static final int procedureColumnReturn

Indicates that the column stores return values.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getProcedureColumns`.

Constant Value: 5 (0x00000005)

### procedureColumnUnknown

    public static final int procedureColumnUnknown

Indicates that type of the column is unknown.

A possible value for the column `COLUMN_TYPE` in the `ResultSet` returned by the method `getProcedureColumns`.

Constant Value: 0 (0x00000000)

### procedureNoNulls

    public static final int procedureNoNulls

Indicates that `NULL` values are not allowed.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getProcedureColumns`.

Constant Value: 0 (0x00000000)

### procedureNoResult

    public static final int procedureNoResult

Indicates that the procedure does not return a result.

A possible value for column `PROCEDURE_TYPE` in the `ResultSet` object returned by the method `getProcedures`.

Constant Value: 1 (0x00000001)

### procedureNullable

    public static final int procedureNullable

Indicates that `NULL` values are allowed.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getProcedureColumns`.

Constant Value: 1 (0x00000001)

### procedureNullableUnknown

    public static final int procedureNullableUnknown

Indicates that whether `NULL` values are allowed is unknown.

A possible value for the column `NULLABLE` in the `ResultSet` object returned by the method `getProcedureColumns`.

Constant Value: 2 (0x00000002)

### procedureResultUnknown

    public static final int procedureResultUnknown

Indicates that it is not known whether the procedure returns a result.

A possible value for column `PROCEDURE_TYPE` in the `ResultSet` object returned by the method `getProcedures`.

Constant Value: 0 (0x00000000)

### procedureReturnsResult

    public static final int procedureReturnsResult

Indicates that the procedure returns a result.

A possible value for column `PROCEDURE_TYPE` in the `ResultSet` object returned by the method `getProcedures`.

Constant Value: 2 (0x00000002)

### sqlStateSQL

    public static final int sqlStateSQL

A possible return value for the method `DatabaseMetaData.getSQLStateType` which is used to indicate whether the value returned by the method `SQLException.getSQLState` is an SQLSTATE value.

Constant Value: 2 (0x00000002)

### sqlStateSQL99

    public static final int sqlStateSQL99

A possible return value for the method `DatabaseMetaData.getSQLStateType` which is used to indicate whether the value returned by the method `SQLException.getSQLState` is an SQL99 SQLSTATE value.

Note:This constant remains only for compatibility reasons. Developers should use the constant `sqlStateSQL` instead.

Constant Value: 2 (0x00000002)

### sqlStateXOpen

    public static final int sqlStateXOpen

A possible return value for the method `DatabaseMetaData.getSQLStateType` which is used to indicate whether the value returned by the method `SQLException.getSQLState` is an X/Open (now know as Open Group) SQL CLI SQLSTATE value.

Constant Value: 1 (0x00000001)

### tableIndexClustered

    public static final short tableIndexClustered

Indicates that this table index is a clustered index.

A possible value for column `TYPE` in the `ResultSet` object returned by the method `getIndexInfo`.

Constant Value: 1 (0x00000001)

### tableIndexHashed

    public static final short tableIndexHashed

Indicates that this table index is a hashed index.

A possible value for column `TYPE` in the `ResultSet` object returned by the method `getIndexInfo`.

Constant Value: 2 (0x00000002)

### tableIndexOther

    public static final short tableIndexOther

Indicates that this table index is not a clustered index, a hashed index, or table statistics; it is something other than these.

A possible value for column `TYPE` in the `ResultSet` object returned by the method `getIndexInfo`.

Constant Value: 3 (0x00000003)

### tableIndexStatistic

    public static final short tableIndexStatistic

Indicates that this column contains table statistics that are returned in conjunction with a table's index descriptions.

A possible value for column `TYPE` in the `ResultSet` object returned by the method `getIndexInfo`.

Constant Value: 0 (0x00000000)

### typeNoNulls

    public static final int typeNoNulls

Indicates that a `NULL` value is NOT allowed for this data type.

A possible value for column `NULLABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 0 (0x00000000)

### typeNullable

    public static final int typeNullable

Indicates that a `NULL` value is allowed for this data type.

A possible value for column `NULLABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 1 (0x00000001)

### typeNullableUnknown

    public static final int typeNullableUnknown

Indicates that it is not known whether a `NULL` value is allowed for this data type.

A possible value for column `NULLABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 2 (0x00000002)

### typePredBasic

    public static final int typePredBasic

Indicates that the data type can be only be used in `WHERE` search clauses that do not use `LIKE` predicates.

A possible value for column `SEARCHABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 2 (0x00000002)

### typePredChar

    public static final int typePredChar

Indicates that the data type can be only be used in `WHERE` search clauses that use `LIKE` predicates.

A possible value for column `SEARCHABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 1 (0x00000001)

### typePredNone

    public static final int typePredNone

Indicates that `WHERE` search clauses are not supported for this type.

A possible value for column `SEARCHABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 0 (0x00000000)

### typeSearchable

    public static final int typeSearchable

Indicates that all `WHERE` search clauses can be based on this type.

A possible value for column `SEARCHABLE` in the `ResultSet` object returned by the method `getTypeInfo`.

Constant Value: 3 (0x00000003)

### versionColumnNotPseudo

    public static final int versionColumnNotPseudo

Indicates that this version column is NOT a pseudo column.

A possible value for the column `PSEUDO_COLUMN` in the `ResultSet` object returned by the method `getVersionColumns`.

Constant Value: 1 (0x00000001)

### versionColumnPseudo

    public static final int versionColumnPseudo

Indicates that this version column is a pseudo column.

A possible value for the column `PSEUDO_COLUMN` in the `ResultSet` object returned by the method `getVersionColumns`.

Constant Value: 2 (0x00000002)

### versionColumnUnknown

    public static final int versionColumnUnknown

Indicates that this version column may or may not be a pseudo column.

A possible value for the column `PSEUDO_COLUMN` in the `ResultSet` object returned by the method `getVersionColumns`.

Constant Value: 0 (0x00000000)

## Public methods

### allProceduresAreCallable

    public abstract boolean allProceduresAreCallable ()

Retrieves whether the current user can call all the procedures returned by the method `getProcedures`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### allTablesAreSelectable

    public abstract boolean allTablesAreSelectable ()

Retrieves whether the current user can use all the tables returned by the method `getTables` in a `SELECT` statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### autoCommitFailureClosesAllResultSets

    public abstract boolean autoCommitFailureClosesAllResultSets ()

Retrieves whether a `SQLException` while autoCommit is `true` inidcates that all open ResultSets are closed, even ones that are holdable. When a `SQLException` occurs while autocommit is `true`, it is vendor specific whether the JDBC driver responds with a commit operation, a rollback operation, or by doing neither a commit nor a rollback. A potential result of this difference is in whether or not holdable ResultSets are closed.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### dataDefinitionCausesTransactionCommit

    public abstract boolean dataDefinitionCausesTransactionCommit ()

Retrieves whether a data definition statement within a transaction forces the transaction to commit.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### dataDefinitionIgnoredInTransactions

    public abstract boolean dataDefinitionIgnoredInTransactions ()

Retrieves whether this database ignores a data definition statement within a transaction.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### deletesAreDetected

    public abstract boolean deletesAreDetected (int type)

Retrieves whether or not a visible row delete can be detected by calling the method `ResultSet.rowDeleted`. If the method `deletesAreDetected` returns `false`, it means that deleted rows are removed from the result set.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if deletes are detected by the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### doesMaxRowSizeIncludeBlobs

    public abstract boolean doesMaxRowSizeIncludeBlobs ()

Retrieves whether the return value for the method `getMaxRowSize` includes the SQL data types `LONGVARCHAR` and `LONGVARBINARY`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### getAttributes

    public abstract ResultSet getAttributes (String catalog,
                    String schemaPattern,
                    String typeNamePattern,
                    String attributeNamePattern)

Retrieves a description of the given attribute of the given type for a user-defined type (UDT) that is available in the given schema and catalog.

Descriptions are returned only for attributes of UDTs matching the catalog, schema, type, and attribute name criteria. They are ordered by `TYPE_CAT`, `TYPE_SCHEM`, `TYPE_NAME` and `ORDINAL_POSITION`. This description does not contain inherited attributes.

The `ResultSet` object that is returned has the following columns:

1. TYPE_CAT String => type catalog (may be `null`)
2. TYPE_SCHEM String => type schema (may be `null`)
3. TYPE_NAME String => type name
4. ATTR_NAME String => attribute name
5. DATA_TYPE int => attribute type SQL type from java.sql.Types
6. ATTR_TYPE_NAME String => Data source dependent type name. For a UDT, the type name is fully qualified. For a REF, the type name is fully qualified and represents the target type of the reference type.
7. ATTR_SIZE int => column size. For char or date types this is the maximum number of characters; for numeric or decimal types this is precision.
8. DECIMAL_DIGITS int => the number of fractional digits. Null is returned for data types where DECIMAL_DIGITS is not applicable.
9. NUM_PREC_RADIX int => Radix (typically either 10 or 2)
10. NULLABLE int => whether NULL is allowed
    - attributeNoNulls - might not allow NULL values
    - attributeNullable - definitely allows NULL values
    - attributeNullableUnknown - nullability unknown
11. REMARKS String => comment describing column (may be `null`)
12. ATTR_DEF String => default value (may be `null`)
13. SQL_DATA_TYPE int => unused
14. SQL_DATETIME_SUB int => unused
15. CHAR_OCTET_LENGTH int => for char types the maximum number of bytes in the column
16. ORDINAL_POSITION int => index of the attribute in the UDT (starting at 1)
17. IS_NULLABLE String => ISO rules are used to determine the nullability for a attribute.
    - YES --- if the attribute can include NULLs
    - NO --- if the attribute cannot include NULLs
    - empty string --- if the nullability for the attribute is unknown
18. SCOPE_CATALOG String => catalog of table that is the scope of a reference attribute (`null` if DATA_TYPE isn't REF)
19. SCOPE_SCHEMA String => schema of table that is the scope of a reference attribute (`null` if DATA_TYPE isn't REF)
20. SCOPE_TABLE String => table name that is the scope of a reference attribute (`null` if the DATA_TYPE isn't REF)
21. SOURCE_DATA_TYPE short => source type of a distinct type or user-generated Ref type,SQL type from java.sql.Types (`null` if DATA_TYPE isn't DISTINCT or user-generated REF)

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`typeNamePattern` | `String`: a type name pattern; must match the type name as it is stored in the database
`attributeNamePattern` | `String`: an attribute name pattern; must match the attribute name as it is declared in the database

Returns
`ResultSet` | a `ResultSet` object in which each row is an attribute description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getBestRowIdentifier

    public abstract ResultSet getBestRowIdentifier (String catalog,
                    String schema,
                    String table,
                    int scope,
                    boolean nullable)

Retrieves a description of a table's optimal set of columns that uniquely identifies a row. They are ordered by SCOPE.

Each column description has the following columns:

1. SCOPE short => actual scope of result
   - bestRowTemporary - very temporary, while using row
   - bestRowTransaction - valid for remainder of current transaction
   - bestRowSession - valid for remainder of current session
2. COLUMN_NAME String => column name
3. DATA_TYPE int => SQL data type from java.sql.Types
4. TYPE_NAME String => Data source dependent type name, for a UDT the type name is fully qualified
5. COLUMN_SIZE int => precision
6. BUFFER_LENGTH int => not used
7. DECIMAL_DIGITS short => scale - Null is returned for data types where DECIMAL_DIGITS is not applicable.
8. PSEUDO_COLUMN short => is this a pseudo column like an Oracle ROWID
   - bestRowUnknown - may or may not be pseudo column
   - bestRowNotPseudo - is NOT a pseudo column
   - bestRowPseudo - is a pseudo column

The COLUMN_SIZE column represents the specified column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in the database
`scope` | `int`: the scope of interest; use same values as SCOPE
`nullable` | `boolean`: include columns that are nullable.

Returns
`ResultSet` | `ResultSet` - each row is a column description

Throws
`SQLException` | if a database access error occurs

### getCatalogSeparator

    public abstract String getCatalogSeparator ()

Retrieves the `String` that this database uses as the separator between a catalog and table name.

Returns
`String` | the separator string

Throws
`SQLException` | if a database access error occurs

### getCatalogTerm

    public abstract String getCatalogTerm ()

Retrieves the database vendor's preferred term for "catalog".

Returns
`String` | the vendor term for "catalog"

Throws
`SQLException` | if a database access error occurs

### getCatalogs

    public abstract ResultSet getCatalogs ()

Retrieves the catalog names available in this database. The results are ordered by catalog name.

The catalog column is:

1. TABLE_CAT String => catalog name

Returns
`ResultSet` | a `ResultSet` object in which each row has a single `String` column that is a catalog name

Throws
`SQLException` | if a database access error occurs

### getClientInfoProperties

    public abstract ResultSet getClientInfoProperties ()

Retrieves a list of the client info properties that the driver supports. The result set contains the following columns

1. NAME String=> The name of the client info property
2. MAX_LEN int=> The maximum length of the value for the property
3. DEFAULT_VALUE String=> The default value of the property
4. DESCRIPTION String=> A description of the property. This will typically contain information as to where this property is stored in the database.

The `ResultSet` is sorted by the NAME column

Returns
`ResultSet` | A `ResultSet` object; each row is a supported client info property

Throws
`SQLException` | if a database access error occurs

### getColumnPrivileges

    public abstract ResultSet getColumnPrivileges (String catalog,
                    String schema,
                    String table,
                    String columnNamePattern)

Retrieves a description of the access rights for a table's columns.

Only privileges matching the column name criteria are returned. They are ordered by COLUMN_NAME and PRIVILEGE.

Each privilige description has the following columns:

1. TABLE_CAT String => table catalog (may be `null`)
2. TABLE_SCHEM String => table schema (may be `null`)
3. TABLE_NAME String => table name
4. COLUMN_NAME String => column name
5. GRANTOR String => grantor of access (may be `null`)
6. GRANTEE String => grantee of access
7. PRIVILEGE String => name of access (SELECT, INSERT, UPDATE, REFRENCES, ...)
8. IS_GRANTABLE String => "YES" if grantee is permitted to grant to others; "NO" if not; `null` if unknown

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in the database
`columnNamePattern` | `String`: a column name pattern; must match the column name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a column privilege description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getColumns

    public abstract ResultSet getColumns (String catalog,
                    String schemaPattern,
                    String tableNamePattern,
                    String columnNamePattern)

Retrieves a description of table columns available in the specified catalog.

Only column descriptions matching the catalog, schema, table and column name criteria are returned. They are ordered by `TABLE_CAT`,`TABLE_SCHEM`, `TABLE_NAME`, and `ORDINAL_POSITION`.

Each column description has the following columns:

1. TABLE_CAT String => table catalog (may be `null`)
2. TABLE_SCHEM String => table schema (may be `null`)
3. TABLE_NAME String => table name
4. COLUMN_NAME String => column name
5. DATA_TYPE int => SQL type from java.sql.Types
6. TYPE_NAME String => Data source dependent type name, for a UDT the type name is fully qualified
7. COLUMN_SIZE int => column size.
8. BUFFER_LENGTH is not used.
9. DECIMAL_DIGITS int => the number of fractional digits. Null is returned for data types where DECIMAL_DIGITS is not applicable.
10. NUM_PREC_RADIX int => Radix (typically either 10 or 2)
11. NULLABLE int => is NULL allowed.
    - columnNoNulls - might not allow `NULL` values
    - columnNullable - definitely allows `NULL` values
    - columnNullableUnknown - nullability unknown
12. REMARKS String => comment describing column (may be `null`)
13. COLUMN_DEF String => default value for the column, which should be interpreted as a string when the value is enclosed in single quotes (may be `null`)
14. SQL_DATA_TYPE int => unused
15. SQL_DATETIME_SUB int => unused
16. CHAR_OCTET_LENGTH int => for char types the maximum number of bytes in the column
17. ORDINAL_POSITION int => index of column in table (starting at 1)
18. IS_NULLABLE String => ISO rules are used to determine the nullability for a column.
    - YES --- if the column can include NULLs
    - NO --- if the column cannot include NULLs
    - empty string --- if the nullability for the column is unknown
19. SCOPE_CATALOG String => catalog of table that is the scope of a reference attribute (`null` if DATA_TYPE isn't REF)
20. SCOPE_SCHEMA String => schema of table that is the scope of a reference attribute (`null` if the DATA_TYPE isn't REF)
21. SCOPE_TABLE String => table name that this the scope of a reference attribute (`null` if the DATA_TYPE isn't REF)
22. SOURCE_DATA_TYPE short => source type of a distinct type or user-generated Ref type, SQL type from java.sql.Types (`null` if DATA_TYPE isn't DISTINCT or user-generated REF)
23. IS_AUTOINCREMENT String => Indicates whether this column is auto incremented
    - YES --- if the column is auto incremented
    - NO --- if the column is not auto incremented
    - empty string --- if it cannot be determined whether the column is auto incremented
24. IS_GENERATEDCOLUMN String => Indicates whether this is a generated column
    - YES --- if this a generated column
    - NO --- if this not a generated column
    - empty string --- if it cannot be determined whether this is a generated column

The COLUMN_SIZE column specifies the column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`tableNamePattern` | `String`: a table name pattern; must match the table name as it is stored in the database
`columnNamePattern` | `String`: a column name pattern; must match the column name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a column description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getConnection

    public abstract Connection getConnection ()

Retrieves the connection that produced this metadata object.

Returns
`Connection` | the connection that produced this metadata object

Throws
`SQLException` | if a database access error occurs

### getCrossReference

    public abstract ResultSet getCrossReference (String parentCatalog,
                    String parentSchema,
                    String parentTable,
                    String foreignCatalog,
                    String foreignSchema,
                    String foreignTable)

Retrieves a description of the foreign key columns in the given foreign key table that reference the primary key or the columns representing a unique constraint of the parent table (could be the same or a different table). The number of columns returned from the parent table must match the number of columns that make up the foreign key. They are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and KEY_SEQ.

Each foreign key column description has the following columns:

1. PKTABLE_CAT String => parent key table catalog (may be `null`)
2. PKTABLE_SCHEM String => parent key table schema (may be `null`)
3. PKTABLE_NAME String => parent key table name
4. PKCOLUMN_NAME String => parent key column name
5. FKTABLE_CAT String => foreign key table catalog (may be `null`) being exported (may be `null`)
6. FKTABLE_SCHEM String => foreign key table schema (may be `null`) being exported (may be `null`)
7. FKTABLE_NAME String => foreign key table name being exported
8. FKCOLUMN_NAME String => foreign key column name being exported
9. KEY_SEQ short => sequence number within foreign key( a value of 1 represents the first column of the foreign key, a value of 2 would represent the second column within the foreign key).
10. UPDATE_RULE short => What happens to foreign key when parent key is updated:
    - importedNoAction - do not allow update of parent key if it has been imported
    - importedKeyCascade - change imported key to agree with parent key update
    - importedKeySetNull - change imported key to `NULL` if its parent key has been updated
    - importedKeySetDefault - change imported key to default values if its parent key has been updated
    - importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
11. DELETE_RULE short => What happens to the foreign key when parent key is deleted.
    - importedKeyNoAction - do not allow delete of parent key if it has been imported
    - importedKeyCascade - delete rows that import a deleted key
    - importedKeySetNull - change imported key to `NULL` if its primary key has been deleted
    - importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
    - importedKeySetDefault - change imported key to default if its parent key has been deleted
12. FK_NAME String => foreign key name (may be `null`)
13. PK_NAME String => parent key name (may be `null`)
14. DEFERRABILITY short => can the evaluation of foreign key constraints be deferred until commit
    - importedKeyInitiallyDeferred - see SQL92 for definition
    - importedKeyInitiallyImmediate - see SQL92 for definition
    - importedKeyNotDeferrable - see SQL92 for definition

Parameters
`parentCatalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means drop catalog name from the selection criteria
`parentSchema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means drop schema name from the selection criteria
`parentTable` | `String`: the name of the table that exports the key; must match the table name as it is stored in the database
`foreignCatalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means drop catalog name from the selection criteria
`foreignSchema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means drop schema name from the selection criteria
`foreignTable` | `String`: the name of the table that imports the key; must match the table name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a foreign key column description

Throws
`SQLException` | if a database access error occurs

See also:

- `getImportedKeys(String, String, String)`

### getDatabaseMajorVersion

    public abstract int getDatabaseMajorVersion ()

Retrieves the major version number of the underlying database.

Returns
`int` | the underlying database's major version

Throws
`SQLException` | if a database access error occurs

### getDatabaseMinorVersion

    public abstract int getDatabaseMinorVersion ()

Retrieves the minor version number of the underlying database.

Returns
`int` | underlying database's minor version

Throws
`SQLException` | if a database access error occurs

### getDatabaseProductName

    public abstract String getDatabaseProductName ()

Retrieves the name of this database product.

Returns
`String` | database product name

Throws
`SQLException` | if a database access error occurs

### getDatabaseProductVersion

    public abstract String getDatabaseProductVersion ()

Retrieves the version number of this database product.

Returns
`String` | database version number

Throws
`SQLException` | if a database access error occurs

### getDefaultTransactionIsolation

    public abstract int getDefaultTransactionIsolation ()

Retrieves this database's default transaction isolation level. The possible values are defined in `java.sql.Connection`.

Returns
`int` | the default isolation level

Throws
`SQLException` | if a database access error occurs

See also:

- `Connection`

### getDriverMajorVersion

    public abstract int getDriverMajorVersion ()

Retrieves this JDBC driver's major version number.

Returns
`int` | JDBC driver major version

### getDriverMinorVersion

    public abstract int getDriverMinorVersion ()

Retrieves this JDBC driver's minor version number.

Returns
`int` | JDBC driver minor version number

### getDriverName

    public abstract String getDriverName ()

Retrieves the name of this JDBC driver.

Returns
`String` | JDBC driver name

Throws
`SQLException` | if a database access error occurs

### getDriverVersion

    public abstract String getDriverVersion ()

Retrieves the version number of this JDBC driver as a `String`.

Returns
`String` | JDBC driver version

Throws
`SQLException` | if a database access error occurs

### getExportedKeys

    public abstract ResultSet getExportedKeys (String catalog,
                    String schema,
                    String table)

Retrieves a description of the foreign key columns that reference the given table's primary key columns (the foreign keys exported by a table). They are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and KEY_SEQ.

Each foreign key column description has the following columns:

1. PKTABLE_CAT String => primary key table catalog (may be `null`)
2. PKTABLE_SCHEM String => primary key table schema (may be `null`)
3. PKTABLE_NAME String => primary key table name
4. PKCOLUMN_NAME String => primary key column name
5. FKTABLE_CAT String => foreign key table catalog (may be `null`) being exported (may be `null`)
6. FKTABLE_SCHEM String => foreign key table schema (may be `null`) being exported (may be `null`)
7. FKTABLE_NAME String => foreign key table name being exported
8. FKCOLUMN_NAME String => foreign key column name being exported
9. KEY_SEQ short => sequence number within foreign key( a value of 1 represents the first column of the foreign key, a value of 2 would represent the second column within the foreign key).
10. UPDATE_RULE short => What happens to foreign key when primary is updated:
    - importedNoAction - do not allow update of primary key if it has been imported
    - importedKeyCascade - change imported key to agree with primary key update
    - importedKeySetNull - change imported key to `NULL` if its primary key has been updated
    - importedKeySetDefault - change imported key to default values if its primary key has been updated
    - importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
11. DELETE_RULE short => What happens to the foreign key when primary is deleted.
    - importedKeyNoAction - do not allow delete of primary key if it has been imported
    - importedKeyCascade - delete rows that import a deleted key
    - importedKeySetNull - change imported key to `NULL` if its primary key has been deleted
    - importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
    - importedKeySetDefault - change imported key to default if its primary key has been deleted
12. FK_NAME String => foreign key name (may be `null`)
13. PK_NAME String => primary key name (may be `null`)
14. DEFERRABILITY short => can the evaluation of foreign key constraints be deferred until commit
    - importedKeyInitiallyDeferred - see SQL92 for definition
    - importedKeyInitiallyImmediate - see SQL92 for definition
    - importedKeyNotDeferrable - see SQL92 for definition

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in this database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in this database

Returns
`ResultSet` | a `ResultSet` object in which each row is a foreign key column description

Throws
`SQLException` | if a database access error occurs

See also:

- `getImportedKeys(String, String, String)`

### getExtraNameCharacters

    public abstract String getExtraNameCharacters ()

Retrieves all the "extra" characters that can be used in unquoted identifier names (those beyond a-z, A-Z, 0-9 and _).

Returns
`String` | the string containing the extra characters

Throws
`SQLException` | if a database access error occurs

### getFunctionColumns

    public abstract ResultSet getFunctionColumns (String catalog,
                    String schemaPattern,
                    String functionNamePattern,
                    String columnNamePattern)

Retrieves a description of the given catalog's system or user function parameters and return type.

Only descriptions matching the schema, function and parameter name criteria are returned. They are ordered by `FUNCTION_CAT`, `FUNCTION_SCHEM`, `FUNCTION_NAME` and `SPECIFIC_ NAME`. Within this, the return value, if any, is first. Next are the parameter descriptions in call order. The column descriptions follow in column number order.

Each row in the `ResultSet` is a parameter description, column description or return type description with the following fields:

1. FUNCTION_CAT String => function catalog (may be `null`)
2. FUNCTION_SCHEM String => function schema (may be `null`)
3. FUNCTION_NAME String => function name. This is the name used to invoke the function
4. COLUMN_NAME String => column/parameter name
5. COLUMN_TYPE Short => kind of column/parameter:
   - functionColumnUnknown - nobody knows
   - functionColumnIn - IN parameter
   - functionColumnInOut - INOUT parameter
   - functionColumnOut - OUT parameter
   - functionColumnReturn - function return value
   - functionColumnResult - Indicates that the parameter or column is a column in the `ResultSet`
6. DATA_TYPE int => SQL type from java.sql.Types
7. TYPE_NAME String => SQL type name, for a UDT type the type name is fully qualified
8. PRECISION int => precision
9. LENGTH int => length in bytes of data
10. SCALE short => scale - null is returned for data types where SCALE is not applicable.
11. RADIX short => radix
12. NULLABLE short => can it contain NULL.
    - functionNoNulls - does not allow NULL values
    - functionNullable - allows NULL values
    - functionNullableUnknown - nullability unknown
13. REMARKS String => comment describing column/parameter
14. CHAR_OCTET_LENGTH int => the maximum length of binary and character based parameters or columns. For any other datatype the returned value is a NULL
15. ORDINAL_POSITION int => the ordinal position, starting from 1, for the input and output parameters. A value of 0 is returned if this row describes the function's return value. For result set columns, it is the ordinal position of the column in the result set starting from 1.
16. IS_NULLABLE String => ISO rules are used to determine the nullability for a parameter or column.
    - YES --- if the parameter or column can include NULLs
    - NO --- if the parameter or column cannot include NULLs
    - empty string --- if the nullability for the parameter or column is unknown
17. SPECIFIC_NAME String => the name which uniquely identifies this function within its schema. This is a user specified, or DBMS generated, name that may be different then the `FUNCTION_NAME` for example with overload functions

The PRECISION column represents the specified column size for the given parameter or column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`functionNamePattern` | `String`: a procedure name pattern; must match the function name as it is stored in the database
`columnNamePattern` | `String`: a parameter name pattern; must match the parameter or column name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row describes a user function parameter, column or return type

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getFunctions

    public abstract ResultSet getFunctions (String catalog,
                    String schemaPattern,
                    String functionNamePattern)

Retrieves a description of the system and user functions available in the given catalog.

Only system and user function descriptions matching the schema and function name criteria are returned. They are ordered by `FUNCTION_CAT`, `FUNCTION_SCHEM`, `FUNCTION_NAME` and `SPECIFIC_ NAME`.

Each function description has the the following columns:

1. FUNCTION_CAT String => function catalog (may be `null`)
2. FUNCTION_SCHEM String => function schema (may be `null`)
3. FUNCTION_NAME String => function name. This is the name used to invoke the function
4. REMARKS String => explanatory comment on the function
5. FUNCTION_TYPE short => kind of function:
   - functionResultUnknown - Cannot determine if a return value or table will be returned
   - functionNoTable- Does not return a table
   - functionReturnsTable - Returns a table
6. SPECIFIC_NAME String => the name which uniquely identifies this function within its schema. This is a user specified, or DBMS generated, name that may be different then the `FUNCTION_NAME` for example with overload functions

A user may not have permission to execute any of the functions that are returned by `getFunctions`

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`functionNamePattern` | `String`: a function name pattern; must match the function name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a function description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getIdentifierQuoteString

    public abstract String getIdentifierQuoteString ()

Retrieves the string used to quote SQL identifiers. This method returns a space " " if identifier quoting is not supported.

Returns
`String` | the quoting string or a space if quoting is not supported

Throws
`SQLException` | if a database access error occurs

### getImportedKeys

    public abstract ResultSet getImportedKeys (String catalog,
                    String schema,
                    String table)

Retrieves a description of the primary key columns that are referenced by the given table's foreign key columns (the primary keys imported by a table). They are ordered by PKTABLE_CAT, PKTABLE_SCHEM, PKTABLE_NAME, and KEY_SEQ.

Each primary key column description has the following columns:

1. PKTABLE_CAT String => primary key table catalog being imported (may be `null`)
2. PKTABLE_SCHEM String => primary key table schema being imported (may be `null`)
3. PKTABLE_NAME String => primary key table name being imported
4. PKCOLUMN_NAME String => primary key column name being imported
5. FKTABLE_CAT String => foreign key table catalog (may be `null`)
6. FKTABLE_SCHEM String => foreign key table schema (may be `null`)
7. FKTABLE_NAME String => foreign key table name
8. FKCOLUMN_NAME String => foreign key column name
9. KEY_SEQ short => sequence number within a foreign key( a value of 1 represents the first column of the foreign key, a value of 2 would represent the second column within the foreign key).
10. UPDATE_RULE short => What happens to a foreign key when the primary key is updated:
    - importedNoAction - do not allow update of primary key if it has been imported
    - importedKeyCascade - change imported key to agree with primary key update
    - importedKeySetNull - change imported key to `NULL` if its primary key has been updated
    - importedKeySetDefault - change imported key to default values if its primary key has been updated
    - importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
11. DELETE_RULE short => What happens to the foreign key when primary is deleted.
    - importedKeyNoAction - do not allow delete of primary key if it has been imported
    - importedKeyCascade - delete rows that import a deleted key
    - importedKeySetNull - change imported key to NULL if its primary key has been deleted
    - importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
    - importedKeySetDefault - change imported key to default if its primary key has been deleted
12. FK_NAME String => foreign key name (may be `null`)
13. PK_NAME String => primary key name (may be `null`)
14. DEFERRABILITY short => can the evaluation of foreign key constraints be deferred until commit
    - importedKeyInitiallyDeferred - see SQL92 for definition
    - importedKeyInitiallyImmediate - see SQL92 for definition
    - importedKeyNotDeferrable - see SQL92 for definition

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a primary key column description

Throws
`SQLException` | if a database access error occurs

See also:

- `getExportedKeys(String, String, String)`

### getIndexInfo

    public abstract ResultSet getIndexInfo (String catalog,
                    String schema,
                    String table,
                    boolean unique,
                    boolean approximate)

Retrieves a description of the given table's indices and statistics. They are ordered by NON_UNIQUE, TYPE, INDEX_NAME, and ORDINAL_POSITION.

Each index column description has the following columns:

1. TABLE_CAT String => table catalog (may be `null`)
2. TABLE_SCHEM String => table schema (may be `null`)
3. TABLE_NAME String => table name
4. NON_UNIQUE boolean => Can index values be non-unique. false when TYPE is tableIndexStatistic
5. INDEX_QUALIFIER String => index catalog (may be `null`); `null` when TYPE is tableIndexStatistic
6. INDEX_NAME String => index name; `null` when TYPE is tableIndexStatistic
7. TYPE short => index type:
   - tableIndexStatistic - this identifies table statistics that are returned in conjuction with a table's index descriptions
   - tableIndexClustered - this is a clustered index
   - tableIndexHashed - this is a hashed index
   - tableIndexOther - this is some other style of index
8. ORDINAL_POSITION short => column sequence number within index; zero when TYPE is tableIndexStatistic
9. COLUMN_NAME String => column name; `null` when TYPE is tableIndexStatistic
10. ASC_OR_DESC String => column sort sequence, "A" => ascending, "D" => descending, may be `null` if sort sequence is not supported; `null` when TYPE is tableIndexStatistic
11. CARDINALITY int => When TYPE is tableIndexStatistic, then this is the number of rows in the table; otherwise, it is the number of unique values in the index.
12. PAGES int => When TYPE is tableIndexStatisic then this is the number of pages used for the table, otherwise it is the number of pages used for the current index.
13. FILTER_CONDITION String => Filter condition, if any. (may be `null`)

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in this database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in this database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in this database
`unique` | `boolean`: when true, return only indices for unique values; when false, return indices regardless of whether unique or not
`approximate` | `boolean`: when true, result is allowed to reflect approximate or out of data values; when false, results are requested to be accurate

Returns
`ResultSet` | `ResultSet` - each row is an index column description

Throws
`SQLException` | if a database access error occurs

### getJDBCMajorVersion

    public abstract int getJDBCMajorVersion ()

Retrieves the major JDBC version number for this driver.

Returns
`int` | JDBC version major number

Throws
`SQLException` | if a database access error occurs

### getJDBCMinorVersion

    public abstract int getJDBCMinorVersion ()

Retrieves the minor JDBC version number for this driver.

Returns
`int` | JDBC version minor number

Throws
`SQLException` | if a database access error occurs

### getMaxBinaryLiteralLength

    public abstract int getMaxBinaryLiteralLength ()

Retrieves the maximum number of hex characters this database allows in an inline binary literal.

Returns
`int` | max the maximum length (in hex characters) for a binary literal; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxCatalogNameLength

    public abstract int getMaxCatalogNameLength ()

Retrieves the maximum number of characters that this database allows in a catalog name.

Returns
`int` | the maximum number of characters allowed in a catalog name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxCharLiteralLength

    public abstract int getMaxCharLiteralLength ()

Retrieves the maximum number of characters this database allows for a character literal.

Returns
`int` | the maximum number of characters allowed for a character literal; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxColumnNameLength

    public abstract int getMaxColumnNameLength ()

Retrieves the maximum number of characters this database allows for a column name.

Returns
`int` | the maximum number of characters allowed for a column name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxColumnsInGroupBy

    public abstract int getMaxColumnsInGroupBy ()

Retrieves the maximum number of columns this database allows in a `GROUP BY` clause.

Returns
`int` | the maximum number of columns allowed; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxColumnsInIndex

    public abstract int getMaxColumnsInIndex ()

Retrieves the maximum number of columns this database allows in an index.

Returns
`int` | the maximum number of columns allowed; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxColumnsInOrderBy

    public abstract int getMaxColumnsInOrderBy ()

Retrieves the maximum number of columns this database allows in an `ORDER BY` clause.

Returns
`int` | the maximum number of columns allowed; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxColumnsInSelect

    public abstract int getMaxColumnsInSelect ()

Retrieves the maximum number of columns this database allows in a `SELECT` list.

Returns
`int` | the maximum number of columns allowed; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxColumnsInTable

    public abstract int getMaxColumnsInTable ()

Retrieves the maximum number of columns this database allows in a table.

Returns
`int` | the maximum number of columns allowed; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxConnections

    public abstract int getMaxConnections ()

Retrieves the maximum number of concurrent connections to this database that are possible.

Returns
`int` | the maximum number of active connections possible at one time; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxCursorNameLength

    public abstract int getMaxCursorNameLength ()

Retrieves the maximum number of characters that this database allows in a cursor name.

Returns
`int` | the maximum number of characters allowed in a cursor name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxIndexLength

    public abstract int getMaxIndexLength ()

Retrieves the maximum number of bytes this database allows for an index, including all of the parts of the index.

Returns
`int` | the maximum number of bytes allowed; this limit includes the composite of all the constituent parts of the index; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxProcedureNameLength

    public abstract int getMaxProcedureNameLength ()

Retrieves the maximum number of characters that this database allows in a procedure name.

Returns
`int` | the maximum number of characters allowed in a procedure name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxRowSize

    public abstract int getMaxRowSize ()

Retrieves the maximum number of bytes this database allows in a single row.

Returns
`int` | the maximum number of bytes allowed for a row; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxSchemaNameLength

    public abstract int getMaxSchemaNameLength ()

Retrieves the maximum number of characters that this database allows in a schema name.

Returns
`int` | the maximum number of characters allowed in a schema name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxStatementLength

    public abstract int getMaxStatementLength ()

Retrieves the maximum number of characters this database allows in an SQL statement.

Returns
`int` | the maximum number of characters allowed for an SQL statement; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxStatements

    public abstract int getMaxStatements ()

Retrieves the maximum number of active statements to this database that can be open at the same time.

Returns
`int` | the maximum number of statements that can be open at one time; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxTableNameLength

    public abstract int getMaxTableNameLength ()

Retrieves the maximum number of characters this database allows in a table name.

Returns
`int` | the maximum number of characters allowed for a table name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxTablesInSelect

    public abstract int getMaxTablesInSelect ()

Retrieves the maximum number of tables this database allows in a `SELECT` statement.

Returns
`int` | the maximum number of tables allowed in a `SELECT` statement; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getMaxUserNameLength

    public abstract int getMaxUserNameLength ()

Retrieves the maximum number of characters this database allows in a user name.

Returns
`int` | the maximum number of characters allowed for a user name; a result of zero means that there is no limit or the limit is not known

Throws
`SQLException` | if a database access error occurs

### getNumericFunctions

    public abstract String getNumericFunctions ()

Retrieves a comma-separated list of math functions available with this database. These are the Open /Open CLI math function names used in the JDBC function escape clause.

Returns
`String` | the list of math functions supported by this database

Throws
`SQLException` | if a database access error occurs

### getPrimaryKeys

    public abstract ResultSet getPrimaryKeys (String catalog,
                    String schema,
                    String table)

Retrieves a description of the given table's primary key columns. They are ordered by COLUMN_NAME.

Each primary key column description has the following columns:

1. TABLE_CAT String => table catalog (may be `null`)
2. TABLE_SCHEM String => table schema (may be `null`)
3. TABLE_NAME String => table name
4. COLUMN_NAME String => column name
5. KEY_SEQ short => sequence number within primary key( a value of 1 represents the first column of the primary key, a value of 2 would represent the second column within the primary key).
6. PK_NAME String => primary key name (may be `null`)

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a primary key column description

Throws
`SQLException` | if a database access error occurs

### getProcedureColumns

    public abstract ResultSet getProcedureColumns (String catalog,
                    String schemaPattern,
                    String procedureNamePattern,
                    String columnNamePattern)

Retrieves a description of the given catalog's stored procedure parameter and result columns.

Only descriptions matching the schema, procedure and parameter name criteria are returned. They are ordered by PROCEDURE_CAT, PROCEDURE_SCHEM, PROCEDURE_NAME and SPECIFIC_NAME. Within this, the return value, if any, is first. Next are the parameter descriptions in call order. The column descriptions follow in column number order.

Each row in the `ResultSet` is a parameter description or column description with the following fields:

1. PROCEDURE_CAT String => procedure catalog (may be `null`)
2. PROCEDURE_SCHEM String => procedure schema (may be `null`)
3. PROCEDURE_NAME String => procedure name
4. COLUMN_NAME String => column/parameter name
5. COLUMN_TYPE Short => kind of column/parameter:
   - procedureColumnUnknown - nobody knows
   - procedureColumnIn - IN parameter
   - procedureColumnInOut - INOUT parameter
   - procedureColumnOut - OUT parameter
   - procedureColumnReturn - procedure return value
   - procedureColumnResult - result column in `ResultSet`
6. DATA_TYPE int => SQL type from java.sql.Types
7. TYPE_NAME String => SQL type name, for a UDT type the type name is fully qualified
8. PRECISION int => precision
9. LENGTH int => length in bytes of data
10. SCALE short => scale - null is returned for data types where SCALE is not applicable.
11. RADIX short => radix
12. NULLABLE short => can it contain NULL.
    - procedureNoNulls - does not allow NULL values
    - procedureNullable - allows NULL values
    - procedureNullableUnknown - nullability unknown
13. REMARKS String => comment describing parameter/column
14. COLUMN_DEF String => default value for the column, which should be interpreted as a string when the value is enclosed in single quotes (may be `null`)
    - The string NULL (not enclosed in quotes) - if NULL was specified as the default value
    - TRUNCATE (not enclosed in quotes) - if the specified default value cannot be represented without truncation
    - NULL - if a default value was not specified
15. SQL_DATA_TYPE int => reserved for future use
16. SQL_DATETIME_SUB int => reserved for future use
17. CHAR_OCTET_LENGTH int => the maximum length of binary and character based columns. For any other datatype the returned value is a NULL
18. ORDINAL_POSITION int => the ordinal position, starting from 1, for the input and output parameters for a procedure. A value of 0 is returned if this row describes the procedure's return value. For result set columns, it is the ordinal position of the column in the result set starting from 1. If there are multiple result sets, the column ordinal positions are implementation defined.
19. IS_NULLABLE String => ISO rules are used to determine the nullability for a column.
    - YES --- if the column can include NULLs
    - NO --- if the column cannot include NULLs
    - empty string --- if the nullability for the column is unknown
20. SPECIFIC_NAME String => the name which uniquely identifies this procedure within its schema.

Note: Some databases may not return the column descriptions for a procedure.

The PRECISION column represents the specified column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`procedureNamePattern` | `String`: a procedure name pattern; must match the procedure name as it is stored in the database
`columnNamePattern` | `String`: a column name pattern; must match the column name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row describes a stored procedure parameter or column

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getProcedureTerm

    public abstract String getProcedureTerm ()

Retrieves the database vendor's preferred term for "procedure".

Returns
`String` | the vendor term for "procedure"

Throws
`SQLException` | if a database access error occurs

### getProcedures

    public abstract ResultSet getProcedures (String catalog,
                    String schemaPattern,
                    String procedureNamePattern)

Retrieves a description of the stored procedures available in the given catalog.

Only procedure descriptions matching the schema and procedure name criteria are returned. They are ordered by `PROCEDURE_CAT`, `PROCEDURE_SCHEM`, `PROCEDURE_NAME` and `SPECIFIC_ NAME`.

Each procedure description has the the following columns:

1. PROCEDURE_CAT String => procedure catalog (may be `null`)
2. PROCEDURE_SCHEM String => procedure schema (may be `null`)
3. PROCEDURE_NAME String => procedure name
4. reserved for future use
5. reserved for future use
6. reserved for future use
7. REMARKS String => explanatory comment on the procedure
8. PROCEDURE_TYPE short => kind of procedure:
   - procedureResultUnknown - Cannot determine if a return value will be returned
   - procedureNoResult - Does not return a return value
   - procedureReturnsResult - Returns a return value
9. SPECIFIC_NAME String => The name which uniquely identifies this procedure within its schema.

A user may not have permissions to execute any of the procedures that are returned by `getProcedures`

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`procedureNamePattern` | `String`: a procedure name pattern; must match the procedure name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a procedure description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getResultSetHoldability

    public abstract int getResultSetHoldability ()

Retrieves this database's default holdability for `ResultSet` objects.

Returns
`int` | the default holdability; either `ResultSet.HOLD_CURSORS_OVER_COMMIT` or `ResultSet.CLOSE_CURSORS_AT_COMMIT`

Throws
`SQLException` | if a database access error occurs

### getRowIdLifetime

    public abstract RowIdLifetime getRowIdLifetime ()

Indicates whether or not this data source supports the SQL `ROWID` type, and if so the lifetime for which a `RowId` object remains valid.

The returned int values have the following relationship:

         ROWID_UNSUPPORTED < ROWID_VALID_OTHER < ROWID_VALID_TRANSACTION
             < ROWID_VALID_SESSION < ROWID_VALID_FOREVER

so conditional logic such as

         if (metadata.getRowIdLifetime() > DatabaseMetaData.ROWID_VALID_TRANSACTION)

can be used. Valid Forever means valid across all Sessions, and valid for a Session means valid across all its contained Transactions.

Returns
`RowIdLifetime` | the status indicating the lifetime of a `RowId`

Throws
`SQLException` | if a database access error occurs

### getSQLKeywords

    public abstract String getSQLKeywords ()

Retrieves a comma-separated list of all of this database's SQL keywords that are NOT also SQL:2003 keywords.

Returns
`String` | the list of this database's keywords that are not also SQL:2003 keywords

Throws
`SQLException` | if a database access error occurs

### getSQLStateType

    public abstract int getSQLStateType ()

Indicates whether the SQLSTATE returned by `SQLException.getSQLState` is X/Open (now known as Open Group) SQL CLI or SQL:2003.

Returns
`int` | the type of SQLSTATE; one of: sqlStateXOpen or sqlStateSQL

Throws
`SQLException` | if a database access error occurs

### getSchemaTerm

    public abstract String getSchemaTerm ()

Retrieves the database vendor's preferred term for "schema".

Returns
`String` | the vendor term for "schema"

Throws
`SQLException` | if a database access error occurs

### getSchemas

    public abstract ResultSet getSchemas (String catalog,
                    String schemaPattern)

Retrieves the schema names available in this database. The results are ordered by `TABLE_CATALOG` and `TABLE_SCHEM`.

The schema columns are:

1. TABLE_SCHEM String => schema name
2. TABLE_CATALOG String => catalog name (may be `null`)

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database;"" retrieves those without a catalog; null means catalog name should not be used to narrow down the search.
`schemaPattern` | `String`: a schema name; must match the schema name as it is stored in the database; null means schema name should not be used to narrow down the search.

Returns
`ResultSet` | a `ResultSet` object in which each row is a schema description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getSchemas

    public abstract ResultSet getSchemas ()

Retrieves the schema names available in this database. The results are ordered by `TABLE_CATALOG` and `TABLE_SCHEM`.

The schema columns are:

1. TABLE_SCHEM String => schema name
2. TABLE_CATALOG String => catalog name (may be `null`)

Returns
`ResultSet` | a `ResultSet` object in which each row is a schema description

Throws
`SQLException` | if a database access error occurs

### getSearchStringEscape

    public abstract String getSearchStringEscape ()

Retrieves the string that can be used to escape wildcard characters. This is the string that can be used to escape '_' or '%' in the catalog search parameters that are a pattern (and therefore use one of the wildcard characters).

The '_' character represents any single character; the '%' character represents any sequence of zero or more characters.

Returns
`String` | the string used to escape wildcard characters

Throws
`SQLException` | if a database access error occurs

### getStringFunctions

    public abstract String getStringFunctions ()

Retrieves a comma-separated list of string functions available with this database. These are the Open Group CLI string function names used in the JDBC function escape clause.

Returns
`String` | the list of string functions supported by this database

Throws
`SQLException` | if a database access error occurs

### getSuperTables

    public abstract ResultSet getSuperTables (String catalog,
                    String schemaPattern,
                    String tableNamePattern)

Retrieves a description of the table hierarchies defined in a particular schema in this database.

Only supertable information for tables matching the catalog, schema and table name are returned. The table name parameter may be a fully- qualified name, in which case, the catalog and schemaPattern parameters are ignored. If a table does not have a super table, it is not listed here. Supertables have to be defined in the same catalog and schema as the sub tables. Therefore, the type description does not need to include this information for the supertable.

Each type description has the following columns:

1. TABLE_CAT String => the type's catalog (may be `null`)
2. TABLE_SCHEM String => type's schema (may be `null`)
3. TABLE_NAME String => type name
4. SUPERTABLE_NAME String => the direct super type's name

Note: If the driver does not support type hierarchies, an empty result set is returned.

Parameters
`catalog` | `String`: a catalog name; "" retrieves those without a catalog; `null` means drop catalog name from the selection criteria
`schemaPattern` | `String`: a schema name pattern; "" retrieves those without a schema
`tableNamePattern` | `String`: a table name pattern; may be a fully-qualified name

Returns
`ResultSet` | a `ResultSet` object in which each row is a type description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getSuperTypes

    public abstract ResultSet getSuperTypes (String catalog,
                    String schemaPattern,
                    String typeNamePattern)

Retrieves a description of the user-defined type (UDT) hierarchies defined in a particular schema in this database. Only the immediate super type/ sub type relationship is modeled.

Only supertype information for UDTs matching the catalog, schema, and type name is returned. The type name parameter may be a fully-qualified name. When the UDT name supplied is a fully-qualified name, the catalog and schemaPattern parameters are ignored.

If a UDT does not have a direct super type, it is not listed here. A row of the `ResultSet` object returned by this method describes the designated UDT and a direct supertype. A row has the following columns:

1. TYPE_CAT String => the UDT's catalog (may be `null`)
2. TYPE_SCHEM String => UDT's schema (may be `null`)
3. TYPE_NAME String => type name of the UDT
4. SUPERTYPE_CAT String => the direct super type's catalog (may be `null`)
5. SUPERTYPE_SCHEM String => the direct super type's schema (may be `null`)
6. SUPERTYPE_NAME String => the direct super type's name

Note: If the driver does not support type hierarchies, an empty result set is returned.

Parameters
`catalog` | `String`: a catalog name; "" retrieves those without a catalog; `null` means drop catalog name from the selection criteria
`schemaPattern` | `String`: a schema name pattern; "" retrieves those without a schema
`typeNamePattern` | `String`: a UDT name pattern; may be a fully-qualified name

Returns
`ResultSet` | a `ResultSet` object in which a row gives information about the designated UDT

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getSystemFunctions

    public abstract String getSystemFunctions ()

Retrieves a comma-separated list of system functions available with this database. These are the Open Group CLI system function names used in the JDBC function escape clause.

Returns
`String` | a list of system functions supported by this database

Throws
`SQLException` | if a database access error occurs

### getTablePrivileges

    public abstract ResultSet getTablePrivileges (String catalog,
                    String schemaPattern,
                    String tableNamePattern)

Retrieves a description of the access rights for each table available in a catalog. Note that a table privilege applies to one or more columns in the table. It would be wrong to assume that this privilege applies to all columns (this may be true for some systems but is not true for all.)

Only privileges matching the schema and table name criteria are returned. They are ordered by `TABLE_CAT`, `TABLE_SCHEM`, `TABLE_NAME`, and `PRIVILEGE`.

Each privilige description has the following columns:

1. TABLE_CAT String => table catalog (may be `null`)
2. TABLE_SCHEM String => table schema (may be `null`)
3. TABLE_NAME String => table name
4. GRANTOR String => grantor of access (may be `null`)
5. GRANTEE String => grantee of access
6. PRIVILEGE String => name of access (SELECT, INSERT, UPDATE, REFRENCES, ...)
7. IS_GRANTABLE String => "YES" if grantee is permitted to grant to others; "NO" if not; `null` if unknown

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`tableNamePattern` | `String`: a table name pattern; must match the table name as it is stored in the database

Returns
`ResultSet` | `ResultSet` - each row is a table privilege description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getTableTypes

    public abstract ResultSet getTableTypes ()

Retrieves the table types available in this database. The results are ordered by table type.

The table type is:

1. TABLE_TYPE String => table type. Typical types are "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".

Returns
`ResultSet` | a `ResultSet` object in which each row has a single `String` column that is a table type

Throws
`SQLException` | if a database access error occurs

### getTables

    public abstract ResultSet getTables (String catalog,
                    String schemaPattern,
                    String tableNamePattern,
                    String[] types)

Retrieves a description of the tables available in the given catalog. Only table descriptions matching the catalog, schema, table name and type criteria are returned. They are ordered by `TABLE_TYPE`, `TABLE_CAT`, `TABLE_SCHEM` and `TABLE_NAME`.

Each table description has the following columns:

1. TABLE_CAT String => table catalog (may be `null`)
2. TABLE_SCHEM String => table schema (may be `null`)
3. TABLE_NAME String => table name
4. TABLE_TYPE String => table type. Typical types are "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
5. REMARKS String => explanatory comment on the table
6. TYPE_CAT String => the types catalog (may be `null`)
7. TYPE_SCHEM String => the types schema (may be `null`)
8. TYPE_NAME String => type name (may be `null`)
9. SELF_REFERENCING_COL_NAME String => name of the designated "identifier" column of a typed table (may be `null`)
10. REF_GENERATION String => specifies how values in SELF_REFERENCING_COL_NAME are created. Values are "SYSTEM", "USER", "DERIVED". (may be `null`)

Note: Some databases may not return information for all tables.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema name pattern; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`tableNamePattern` | `String`: a table name pattern; must match the table name as it is stored in the database
`types` | `String`: a list of table types, which must be from the list of table types returned from `getTableTypes()`,to include; `null` returns all types

Returns
`ResultSet` | `ResultSet` - each row is a table description

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getTimeDateFunctions

    public abstract String getTimeDateFunctions ()

Retrieves a comma-separated list of the time and date functions available with this database.

Returns
`String` | the list of time and date functions supported by this database

Throws
`SQLException` | if a database access error occurs

### getTypeInfo

    public abstract ResultSet getTypeInfo ()

Retrieves a description of all the data types supported by this database. They are ordered by DATA_TYPE and then by how closely the data type maps to the corresponding JDBC SQL type.

If the database supports SQL distinct types, then getTypeInfo() will return a single row with a TYPE_NAME of DISTINCT and a DATA_TYPE of Types.DISTINCT. If the database supports SQL structured types, then getTypeInfo() will return a single row with a TYPE_NAME of STRUCT and a DATA_TYPE of Types.STRUCT.

If SQL distinct or structured types are supported, then information on the individual types may be obtained from the getUDTs() method.

Each type description has the following columns:

1. TYPE_NAME String => Type name
2. DATA_TYPE int => SQL data type from java.sql.Types
3. PRECISION int => maximum precision
4. LITERAL_PREFIX String => prefix used to quote a literal (may be `null`)
5. LITERAL_SUFFIX String => suffix used to quote a literal (may be `null`)
6. CREATE_PARAMS String => parameters used in creating the type (may be `null`)
7. NULLABLE short => can you use NULL for this type.
   - typeNoNulls - does not allow NULL values
   - typeNullable - allows NULL values
   - typeNullableUnknown - nullability unknown
8. CASE_SENSITIVE boolean=> is it case sensitive.
9. SEARCHABLE short => can you use "WHERE" based on this type:
   - typePredNone - No support
   - typePredChar - Only supported with WHERE .. LIKE
   - typePredBasic - Supported except for WHERE .. LIKE
   - typeSearchable - Supported for all WHERE ..
10. UNSIGNED_ATTRIBUTE boolean => is it unsigned.
11. FIXED_PREC_SCALE boolean => can it be a money value.
12. AUTO_INCREMENT boolean => can it be used for an auto-increment value.
13. LOCAL_TYPE_NAME String => localized version of type name (may be `null`)
14. MINIMUM_SCALE short => minimum scale supported
15. MAXIMUM_SCALE short => maximum scale supported
16. SQL_DATA_TYPE int => unused
17. SQL_DATETIME_SUB int => unused
18. NUM_PREC_RADIX int => usually 2 or 10

The PRECISION column represents the maximum column size that the server supports for the given datatype. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.

Returns
`ResultSet` | a `ResultSet` object in which each row is an SQL type description

Throws
`SQLException` | if a database access error occurs

### getUDTs

    public abstract ResultSet getUDTs (String catalog,
                    String schemaPattern,
                    String typeNamePattern,
                    int[] types)

Retrieves a description of the user-defined types (UDTs) defined in a particular schema. Schema-specific UDTs may have type `JAVA_OBJECT`, `STRUCT`, or `DISTINCT`.

Only types matching the catalog, schema, type name and type criteria are returned. They are ordered by `DATA_TYPE`, `TYPE_CAT`, `TYPE_SCHEM` and `TYPE_NAME`. The type name parameter may be a fully-qualified name. In this case, the catalog and schemaPattern parameters are ignored.

Each type description has the following columns:

1. TYPE_CAT String => the type's catalog (may be `null`)
2. TYPE_SCHEM String => type's schema (may be `null`)
3. TYPE_NAME String => type name
4. CLASS_NAME String => Java class name
5. DATA_TYPE int => type value defined in java.sql.Types. One of JAVA_OBJECT, STRUCT, or DISTINCT
6. REMARKS String => explanatory comment on the type
7. BASE_TYPE short => type code of the source type of a DISTINCT type or the type that implements the user-generated reference type of the SELF_REFERENCING_COLUMN of a structured type as defined in java.sql.Types (`null` if DATA_TYPE is not DISTINCT or not STRUCT with REFERENCE_GENERATION = USER_DEFINED)

Note: If the driver does not support UDTs, an empty result set is returned.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schemaPattern` | `String`: a schema pattern name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`typeNamePattern` | `String`: a type name pattern; must match the type name as it is stored in the database; may be a fully qualified name
`types` | `int`: a list of user-defined types (JAVA_OBJECT, STRUCT, or DISTINCT) to include; `null` returns all types

Returns
`ResultSet` | `ResultSet` object in which each row describes a UDT

Throws
`SQLException` | if a database access error occurs

See also:

- `getSearchStringEscape()`

### getURL

    public abstract String getURL ()

Retrieves the URL for this DBMS.

Returns
`String` | the URL for this DBMS or `null` if it cannot be generated

Throws
`SQLException` | if a database access error occurs

### getUserName

    public abstract String getUserName ()

Retrieves the user name as known to this database.

Returns
`String` | the database user name

Throws
`SQLException` | if a database access error occurs

### getVersionColumns

    public abstract ResultSet getVersionColumns (String catalog,
                    String schema,
                    String table)

Retrieves a description of a table's columns that are automatically updated when any value in a row is updated. They are unordered.

Each column description has the following columns:

1. SCOPE short => is not used
2. COLUMN_NAME String => column name
3. DATA_TYPE int => SQL data type from `java.sql.Types`
4. TYPE_NAME String => Data source-dependent type name
5. COLUMN_SIZE int => precision
6. BUFFER_LENGTH int => length of column value in bytes
7. DECIMAL_DIGITS short => scale - Null is returned for data types where DECIMAL_DIGITS is not applicable.
8. PSEUDO_COLUMN short => whether this is pseudo column like an Oracle ROWID
   - versionColumnUnknown - may or may not be pseudo column
   - versionColumnNotPseudo - is NOT a pseudo column
   - versionColumnPseudo - is a pseudo column

The COLUMN_SIZE column represents the specified column size for the given column. For numeric data, this is the maximum precision. For character data, this is the length in characters. For datetime datatypes, this is the length in characters of the String representation (assuming the maximum allowed precision of the fractional seconds component). For binary data, this is the length in bytes. For the ROWID datatype, this is the length in bytes. Null is returned for data types where the column size is not applicable.

Parameters
`catalog` | `String`: a catalog name; must match the catalog name as it is stored in the database; "" retrieves those without a catalog; `null` means that the catalog name should not be used to narrow the search
`schema` | `String`: a schema name; must match the schema name as it is stored in the database; "" retrieves those without a schema; `null` means that the schema name should not be used to narrow the search
`table` | `String`: a table name; must match the table name as it is stored in the database

Returns
`ResultSet` | a `ResultSet` object in which each row is a column description

Throws
`SQLException` | if a database access error occurs

### insertsAreDetected

    public abstract boolean insertsAreDetected (int type)

Retrieves whether or not a visible row insert can be detected by calling the method `ResultSet.rowInserted`.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if changes are detected by the specified result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### isCatalogAtStart

    public abstract boolean isCatalogAtStart ()

Retrieves whether a catalog appears at the start of a fully qualified table name. If not, the catalog appears at the end.

Returns
`boolean` | `true` if the catalog name appears at the beginning of a fully qualified table name; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### isReadOnly

    public abstract boolean isReadOnly ()

Retrieves whether this database is in read-only mode.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### locatorsUpdateCopy

    public abstract boolean locatorsUpdateCopy ()

Indicates whether updates made to a LOB are made on a copy or directly to the LOB.

Returns
`boolean` | `true` if updates are made to a copy of the LOB; `false` if updates are made directly to the LOB

Throws
`SQLException` | if a database access error occurs

### nullPlusNonNullIsNull

    public abstract boolean nullPlusNonNullIsNull ()

Retrieves whether this database supports concatenations between `NULL` and non-`NULL` values being `NULL`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### nullsAreSortedAtEnd

    public abstract boolean nullsAreSortedAtEnd ()

Retrieves whether `NULL` values are sorted at the end regardless of sort order.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### nullsAreSortedAtStart

    public abstract boolean nullsAreSortedAtStart ()

Retrieves whether `NULL` values are sorted at the start regardless of sort order.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### nullsAreSortedHigh

    public abstract boolean nullsAreSortedHigh ()

Retrieves whether `NULL` values are sorted high. Sorted high means that `NULL` values sort higher than any other value in a domain. In an ascending order, if this method returns `true`, `NULL` values will appear at the end. By contrast, the method `nullsAreSortedAtEnd` indicates whether `NULL` values are sorted at the end regardless of sort order.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### nullsAreSortedLow

    public abstract boolean nullsAreSortedLow ()

Retrieves whether `NULL` values are sorted low. Sorted low means that `NULL` values sort lower than any other value in a domain. In an ascending order, if this method returns `true`, `NULL` values will appear at the beginning. By contrast, the method `nullsAreSortedAtStart` indicates whether `NULL` values are sorted at the beginning regardless of sort order.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### othersDeletesAreVisible

    public abstract boolean othersDeletesAreVisible (int type)

Retrieves whether deletes made by others are visible.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if deletes made by others are visible for the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### othersInsertsAreVisible

    public abstract boolean othersInsertsAreVisible (int type)

Retrieves whether inserts made by others are visible.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if inserts made by others are visible for the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### othersUpdatesAreVisible

    public abstract boolean othersUpdatesAreVisible (int type)

Retrieves whether updates made by others are visible.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if updates made by others are visible for the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### ownDeletesAreVisible

    public abstract boolean ownDeletesAreVisible (int type)

Retrieves whether a result set's own deletes are visible.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if deletes are visible for the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### ownInsertsAreVisible

    public abstract boolean ownInsertsAreVisible (int type)

Retrieves whether a result set's own inserts are visible.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if inserts are visible for the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### ownUpdatesAreVisible

    public abstract boolean ownUpdatesAreVisible (int type)

Retrieves whether for the given type of `ResultSet` object, the result set's own updates are visible.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if updates are visible for the given result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### storesLowerCaseIdentifiers

    public abstract boolean storesLowerCaseIdentifiers ()

Retrieves whether this database treats mixed case unquoted SQL identifiers as case insensitive and stores them in lower case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### storesLowerCaseQuotedIdentifiers

    public abstract boolean storesLowerCaseQuotedIdentifiers ()

Retrieves whether this database treats mixed case quoted SQL identifiers as case insensitive and stores them in lower case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### storesMixedCaseIdentifiers

    public abstract boolean storesMixedCaseIdentifiers ()

Retrieves whether this database treats mixed case unquoted SQL identifiers as case insensitive and stores them in mixed case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### storesMixedCaseQuotedIdentifiers

    public abstract boolean storesMixedCaseQuotedIdentifiers ()

Retrieves whether this database treats mixed case quoted SQL identifiers as case insensitive and stores them in mixed case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### storesUpperCaseIdentifiers

    public abstract boolean storesUpperCaseIdentifiers ()

Retrieves whether this database treats mixed case unquoted SQL identifiers as case insensitive and stores them in upper case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### storesUpperCaseQuotedIdentifiers

    public abstract boolean storesUpperCaseQuotedIdentifiers ()

Retrieves whether this database treats mixed case quoted SQL identifiers as case insensitive and stores them in upper case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsANSI92EntryLevelSQL

    public abstract boolean supportsANSI92EntryLevelSQL ()

Retrieves whether this database supports the ANSI92 entry level SQL grammar.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsANSI92FullSQL

    public abstract boolean supportsANSI92FullSQL ()

Retrieves whether this database supports the ANSI92 full SQL grammar supported.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsANSI92IntermediateSQL

    public abstract boolean supportsANSI92IntermediateSQL ()

Retrieves whether this database supports the ANSI92 intermediate SQL grammar supported.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsAlterTableWithAddColumn

    public abstract boolean supportsAlterTableWithAddColumn ()

Retrieves whether this database supports `ALTER TABLE` with add column.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsAlterTableWithDropColumn

    public abstract boolean supportsAlterTableWithDropColumn ()

Retrieves whether this database supports `ALTER TABLE` with drop column.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsBatchUpdates

    public abstract boolean supportsBatchUpdates ()

Retrieves whether this database supports batch updates.

Returns
`boolean` | `true` if this database supports batch upcates; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCatalogsInDataManipulation

    public abstract boolean supportsCatalogsInDataManipulation ()

Retrieves whether a catalog name can be used in a data manipulation statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCatalogsInIndexDefinitions

    public abstract boolean supportsCatalogsInIndexDefinitions ()

Retrieves whether a catalog name can be used in an index definition statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCatalogsInPrivilegeDefinitions

    public abstract boolean supportsCatalogsInPrivilegeDefinitions ()

Retrieves whether a catalog name can be used in a privilege definition statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCatalogsInProcedureCalls

    public abstract boolean supportsCatalogsInProcedureCalls ()

Retrieves whether a catalog name can be used in a procedure call statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCatalogsInTableDefinitions

    public abstract boolean supportsCatalogsInTableDefinitions ()

Retrieves whether a catalog name can be used in a table definition statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsColumnAliasing

    public abstract boolean supportsColumnAliasing ()

Retrieves whether this database supports column aliasing.

If so, the SQL AS clause can be used to provide names for computed columns or to provide alias names for columns as required.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsConvert

    public abstract boolean supportsConvert (int fromType,
                    int toType)

Retrieves whether this database supports the JDBC scalar function `CONVERT` for conversions between the JDBC types fromType and toType. The JDBC types are the generic SQL data types defined in `java.sql.Types`.

Parameters
`fromType` | `int`: the type to convert from; one of the type codes from the class `java.sql.Types`
`toType` | `int`: the type to convert to; one of the type codes from the class `java.sql.Types`

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

See also:

- `Types`

### supportsConvert

    public abstract boolean supportsConvert ()

Retrieves whether this database supports the JDBC scalar function `CONVERT` for the conversion of one JDBC type to another. The JDBC types are the generic SQL data types defined in `java.sql.Types`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCoreSQLGrammar

    public abstract boolean supportsCoreSQLGrammar ()

Retrieves whether this database supports the ODBC Core SQL grammar.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsCorrelatedSubqueries

    public abstract boolean supportsCorrelatedSubqueries ()

Retrieves whether this database supports correlated subqueries.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsDataDefinitionAndDataManipulationTransactions

    public abstract boolean supportsDataDefinitionAndDataManipulationTransactions ()

Retrieves whether this database supports both data definition and data manipulation statements within a transaction.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsDataManipulationTransactionsOnly

    public abstract boolean supportsDataManipulationTransactionsOnly ()

Retrieves whether this database supports only data manipulation statements within a transaction.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsDifferentTableCorrelationNames

    public abstract boolean supportsDifferentTableCorrelationNames ()

Retrieves whether, when table correlation names are supported, they are restricted to being different from the names of the tables.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsExpressionsInOrderBy

    public abstract boolean supportsExpressionsInOrderBy ()

Retrieves whether this database supports expressions in `ORDER BY` lists.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsExtendedSQLGrammar

    public abstract boolean supportsExtendedSQLGrammar ()

Retrieves whether this database supports the ODBC Extended SQL grammar.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsFullOuterJoins

    public abstract boolean supportsFullOuterJoins ()

Retrieves whether this database supports full nested outer joins.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsGetGeneratedKeys

    public abstract boolean supportsGetGeneratedKeys ()

Retrieves whether auto-generated keys can be retrieved after a statement has been executed

Returns
`boolean` | `true` if auto-generated keys can be retrieved after a statement has executed; `false` otherwise If `true` is returned, the JDBC driver must support the returning of auto-generated keys for at least SQL INSERT statements

Throws
`SQLException` | if a database access error occurs

### supportsGroupBy

    public abstract boolean supportsGroupBy ()

Retrieves whether this database supports some form of `GROUP BY` clause.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsGroupByBeyondSelect

    public abstract boolean supportsGroupByBeyondSelect ()

Retrieves whether this database supports using columns not included in the `SELECT` statement in a `GROUP BY` clause provided that all of the columns in the `SELECT` statement are included in the `GROUP BY` clause.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsGroupByUnrelated

    public abstract boolean supportsGroupByUnrelated ()

Retrieves whether this database supports using a column that is not in the `SELECT` statement in a `GROUP BY` clause.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsIntegrityEnhancementFacility

    public abstract boolean supportsIntegrityEnhancementFacility ()

Retrieves whether this database supports the SQL Integrity Enhancement Facility.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsLikeEscapeClause

    public abstract boolean supportsLikeEscapeClause ()

Retrieves whether this database supports specifying a `LIKE` escape clause.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsLimitedOuterJoins

    public abstract boolean supportsLimitedOuterJoins ()

Retrieves whether this database provides limited support for outer joins. (This will be `true` if the method `supportsFullOuterJoins` returns `true`).

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsMinimumSQLGrammar

    public abstract boolean supportsMinimumSQLGrammar ()

Retrieves whether this database supports the ODBC Minimum SQL grammar.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsMixedCaseIdentifiers

    public abstract boolean supportsMixedCaseIdentifiers ()

Retrieves whether this database treats mixed case unquoted SQL identifiers as case sensitive and as a result stores them in mixed case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsMixedCaseQuotedIdentifiers

    public abstract boolean supportsMixedCaseQuotedIdentifiers ()

Retrieves whether this database treats mixed case quoted SQL identifiers as case sensitive and as a result stores them in mixed case.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsMultipleOpenResults

    public abstract boolean supportsMultipleOpenResults ()

Retrieves whether it is possible to have multiple `ResultSet` objects returned from a `CallableStatement` object simultaneously.

Returns
`boolean` | `true` if a `CallableStatement` object can return multiple `ResultSet` objects simultaneously; `false` otherwise

Throws
`SQLException` | if a datanase access error occurs

### supportsMultipleResultSets

    public abstract boolean supportsMultipleResultSets ()

Retrieves whether this database supports getting multiple `ResultSet` objects from a single call to the method `execute`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsMultipleTransactions

    public abstract boolean supportsMultipleTransactions ()

Retrieves whether this database allows having multiple transactions open at once (on different connections).

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsNamedParameters

    public abstract boolean supportsNamedParameters ()

Retrieves whether this database supports named parameters to callable statements.

Returns
`boolean` | `true` if named parameters are supported; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsNonNullableColumns

    public abstract boolean supportsNonNullableColumns ()

Retrieves whether columns in this database may be defined as non-nullable.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsOpenCursorsAcrossCommit

    public abstract boolean supportsOpenCursorsAcrossCommit ()

Retrieves whether this database supports keeping cursors open across commits.

Returns
`boolean` | `true` if cursors always remain open; `false` if they might not remain open

Throws
`SQLException` | if a database access error occurs

### supportsOpenCursorsAcrossRollback

    public abstract boolean supportsOpenCursorsAcrossRollback ()

Retrieves whether this database supports keeping cursors open across rollbacks.

Returns
`boolean` | `true` if cursors always remain open; `false` if they might not remain open

Throws
`SQLException` | if a database access error occurs

### supportsOpenStatementsAcrossCommit

    public abstract boolean supportsOpenStatementsAcrossCommit ()

Retrieves whether this database supports keeping statements open across commits.

Returns
`boolean` | `true` if statements always remain open; `false` if they might not remain open

Throws
`SQLException` | if a database access error occurs

### supportsOpenStatementsAcrossRollback

    public abstract boolean supportsOpenStatementsAcrossRollback ()

Retrieves whether this database supports keeping statements open across rollbacks.

Returns
`boolean` | `true` if statements always remain open; `false` if they might not remain open

Throws
`SQLException` | if a database access error occurs

### supportsOrderByUnrelated

    public abstract boolean supportsOrderByUnrelated ()

Retrieves whether this database supports using a column that is not in the `SELECT` statement in an `ORDER BY` clause.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsOuterJoins

    public abstract boolean supportsOuterJoins ()

Retrieves whether this database supports some form of outer join.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsPositionedDelete

    public abstract boolean supportsPositionedDelete ()

Retrieves whether this database supports positioned `DELETE` statements.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsPositionedUpdate

    public abstract boolean supportsPositionedUpdate ()

Retrieves whether this database supports positioned `UPDATE` statements.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsResultSetConcurrency

    public abstract boolean supportsResultSetConcurrency (int type,
                    int concurrency)

Retrieves whether this database supports the given concurrency type in combination with the given result set type.

Parameters
`type` | `int`: defined in `java.sql.ResultSet`
`concurrency` | `int`: type defined in `java.sql.ResultSet`

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

See also:

- `Connection`

### supportsResultSetHoldability

    public abstract boolean supportsResultSetHoldability (int holdability)

Retrieves whether this database supports the given result set holdability.

Parameters
`holdability` | `int`: one of the following constants: `ResultSet.HOLD_CURSORS_OVER_COMMIT` or `ResultSet.CLOSE_CURSORS_AT_COMMIT```

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

See also:

- `Connection`

### supportsResultSetType

    public abstract boolean supportsResultSetType (int type)

Retrieves whether this database supports the given result set type.

Parameters
`type` | `int`: defined in `java.sql.ResultSet`

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

See also:

- `Connection`

### supportsSavepoints

    public abstract boolean supportsSavepoints ()

Retrieves whether this database supports savepoints.

Returns
`boolean` | `true` if savepoints are supported; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSchemasInDataManipulation

    public abstract boolean supportsSchemasInDataManipulation ()

Retrieves whether a schema name can be used in a data manipulation statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSchemasInIndexDefinitions

    public abstract boolean supportsSchemasInIndexDefinitions ()

Retrieves whether a schema name can be used in an index definition statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSchemasInPrivilegeDefinitions

    public abstract boolean supportsSchemasInPrivilegeDefinitions ()

Retrieves whether a schema name can be used in a privilege definition statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSchemasInProcedureCalls

    public abstract boolean supportsSchemasInProcedureCalls ()

Retrieves whether a schema name can be used in a procedure call statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSchemasInTableDefinitions

    public abstract boolean supportsSchemasInTableDefinitions ()

Retrieves whether a schema name can be used in a table definition statement.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSelectForUpdate

    public abstract boolean supportsSelectForUpdate ()

Retrieves whether this database supports `SELECT FOR UPDATE` statements.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsStatementPooling

    public abstract boolean supportsStatementPooling ()

Retrieves whether this database supports statement pooling.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsStoredFunctionsUsingCallSyntax

    public abstract boolean supportsStoredFunctionsUsingCallSyntax ()

Retrieves whether this database supports invoking user-defined or vendor functions using the stored procedure escape syntax.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsStoredProcedures

    public abstract boolean supportsStoredProcedures ()

Retrieves whether this database supports stored procedure calls that use the stored procedure escape syntax.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSubqueriesInComparisons

    public abstract boolean supportsSubqueriesInComparisons ()

Retrieves whether this database supports subqueries in comparison expressions.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSubqueriesInExists

    public abstract boolean supportsSubqueriesInExists ()

Retrieves whether this database supports subqueries in `EXISTS` expressions.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSubqueriesInIns

    public abstract boolean supportsSubqueriesInIns ()

Retrieves whether this database supports subqueries in `IN` expressions.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsSubqueriesInQuantifieds

    public abstract boolean supportsSubqueriesInQuantifieds ()

Retrieves whether this database supports subqueries in quantified expressions.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsTableCorrelationNames

    public abstract boolean supportsTableCorrelationNames ()

Retrieves whether this database supports table correlation names.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsTransactionIsolationLevel

    public abstract boolean supportsTransactionIsolationLevel (int level)

Retrieves whether this database supports the given transaction isolation level.

Parameters
`level` | `int`: one of the transaction isolation levels defined in `java.sql.Connection`

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

See also:

- `Connection`

### supportsTransactions

    public abstract boolean supportsTransactions ()

Retrieves whether this database supports transactions. If not, invoking the method `commit` is a noop, and the isolation level is `TRANSACTION_NONE`.

Returns
`boolean` | `true` if transactions are supported; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsUnion

    public abstract boolean supportsUnion ()

Retrieves whether this database supports SQL `UNION`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### supportsUnionAll

    public abstract boolean supportsUnionAll ()

Retrieves whether this database supports SQL `UNION ALL`.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### updatesAreDetected

    public abstract boolean updatesAreDetected (int type)

Retrieves whether or not a visible row update can be detected by calling the method `ResultSet.rowUpdated`.

Parameters
`type` | `int`: the `ResultSet` type; one of `ResultSet.TYPE_FORWARD_ONLY`, `ResultSet.TYPE_SCROLL_INSENSITIVE`, or `ResultSet.TYPE_SCROLL_SENSITIVE`

Returns
`boolean` | `true` if changes are detected by the result set type; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### usesLocalFilePerTable

    public abstract boolean usesLocalFilePerTable ()

Retrieves whether this database uses a file for each table.

Returns
`boolean` | `true` if this database uses a local file for each table; `false` otherwise

Throws
`SQLException` | if a database access error occurs

### usesLocalFiles

    public abstract boolean usesLocalFiles ()

Retrieves whether this database stores tables in a local file.

Returns
`boolean` | `true` if so; `false` otherwise

Throws
`SQLException` | if a database access error occurs

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